diff --git a/.evergreen/config/generated/build/build-libmongoc-8.3.yml b/.evergreen/config/generated/build/build-libmongoc-8.3.yml
index b1d695baf..d5a174930 100644
--- a/.evergreen/config/generated/build/build-libmongoc-8.3.yml
+++ b/.evergreen/config/generated/build/build-libmongoc-8.3.yml
@@ -12,7 +12,7 @@ tasks:
       - func: "compile driver"
         vars:
           PHP_VERSION: "8.3"
-          LIBMONGOC_VERSION: "1.26.2"
+          LIBMONGOC_VERSION: "1.27.0"
       - func: "upload build"
 
   - name: "build-php-8.3-libmongoc-next-stable"
@@ -21,7 +21,7 @@ tasks:
       - func: "compile driver"
         vars:
           PHP_VERSION: "8.3"
-          LIBMONGOC_VERSION: "r1.26"
+          LIBMONGOC_VERSION: "r1.27"
       - func: "upload build"
 
   - name: "build-php-8.3-libmongoc-latest"
diff --git a/.evergreen/config/templates/build/build-libmongoc.yml b/.evergreen/config/templates/build/build-libmongoc.yml
index e7e7b1831..4e36c8815 100644
--- a/.evergreen/config/templates/build/build-libmongoc.yml
+++ b/.evergreen/config/templates/build/build-libmongoc.yml
@@ -11,7 +11,7 @@ tasks:
       - func: "compile driver"
         vars:
           PHP_VERSION: "%phpVersion%"
-          LIBMONGOC_VERSION: "1.26.2"
+          LIBMONGOC_VERSION: "1.27.0"
       - func: "upload build"
 
   - name: "build-php-%phpVersion%-libmongoc-next-stable"
@@ -20,7 +20,7 @@ tasks:
       - func: "compile driver"
         vars:
           PHP_VERSION: "%phpVersion%"
-          LIBMONGOC_VERSION: "r1.26"
+          LIBMONGOC_VERSION: "r1.27"
       - func: "upload build"
 
   - name: "build-php-%phpVersion%-libmongoc-latest"
diff --git a/config.m4 b/config.m4
index 8ce37947c..ea86476eb 100644
--- a/config.m4
+++ b/config.m4
@@ -270,7 +270,7 @@ if test "$PHP_MONGODB" != "no"; then
   PHP_MONGODB_MONGOCRYPT_VERSION_STRING="None"
 
   if test "$PHP_MONGODB_SYSTEM_LIBS" != "no"; then
-    PKG_CHECK_MODULES([PHP_MONGODB_BSON], [libbson-1.0 >= 1.26.2], [
+    PKG_CHECK_MODULES([PHP_MONGODB_BSON], [libbson-1.0 >= 1.27.0], [
       PHP_MONGODB_BSON_VERSION=`$PKG_CONFIG libbson-1.0 --modversion`
       PHP_MONGODB_BSON_VERSION_STRING="System ($PHP_MONGODB_BSON_VERSION)"
 
@@ -278,10 +278,10 @@ if test "$PHP_MONGODB" != "no"; then
       PHP_EVAL_LIBLINE($PHP_MONGODB_BSON_LIBS, MONGODB_SHARED_LIBADD)
       AC_DEFINE(HAVE_SYSTEM_LIBBSON, 1, [Use system libbson])
     ],[
-      AC_MSG_ERROR([Could not find system library for libbson >= 1.26.2])
+      AC_MSG_ERROR([Could not find system library for libbson >= 1.27.0])
     ])
 
-    PKG_CHECK_MODULES([PHP_MONGODB_MONGOC], [libmongoc-1.0 >= 1.26.2], [
+    PKG_CHECK_MODULES([PHP_MONGODB_MONGOC], [libmongoc-1.0 >= 1.27.0], [
       PHP_MONGODB_BSON_VERSION=`$PKG_CONFIG libbson-1.0 --modversion`
       PHP_MONGODB_BSON_VERSION_STRING="System ($PHP_MONGODB_BSON_VERSION)"
 
@@ -289,7 +289,7 @@ if test "$PHP_MONGODB" != "no"; then
       PHP_EVAL_LIBLINE($PHP_MONGODB_MONGOC_LIBS, MONGODB_SHARED_LIBADD)
       AC_DEFINE(HAVE_SYSTEM_LIBMONGOC, 1, [Use system libmongoc])
     ],[
-      AC_MSG_ERROR(Could not find system library for libmongoc >= 1.26.2)
+      AC_MSG_ERROR(Could not find system library for libmongoc >= 1.27.0)
     ])
 
     if test "$PHP_MONGODB_CLIENT_SIDE_ENCRYPTION" != "no"; then
@@ -387,7 +387,7 @@ if test "$PHP_MONGODB" != "no"; then
     PHP_MONGODB_KMS_MESSAGE_SOURCES="hexlify.c kms_azure_request.c kms_b64.c kms_caller_identity_request.c kms_crypto_apple.c kms_crypto_libcrypto.c kms_crypto_none.c kms_crypto_windows.c kms_decrypt_request.c kms_encrypt_request.c kms_gcp_request.c kms_kmip_reader_writer.c kms_kmip_request.c kms_kmip_response.c kms_kmip_response_parser.c kms_kv_list.c kms_message.c kms_port.c kms_request.c kms_request_opt.c kms_request_str.c kms_response.c kms_response_parser.c sort.c"
     PHP_MONGODB_BSON_SOURCES="bcon.c bson-atomic.c bson.c bson-clock.c bson-context.c bson-decimal128.c bson-error.c bson-iso8601.c bson-iter.c bson-json.c bson-keys.c bson-md5.c bson-memory.c bson-oid.c bson-reader.c bson-string.c bson-timegm.c bson-utf8.c bson-value.c bson-version-functions.c bson-writer.c"
     PHP_MONGODB_JSONSL_SOURCES="jsonsl.c"
-    PHP_MONGODB_MONGOC_SOURCES="mcd-azure.c mcd-rpc.c mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-deprioritized-servers.c mongoc-error.c mongoc-find-and-modify.c mongoc-flags.c mongoc-generation-map.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-opcode.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-shared.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-ts-pool.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-concern.c service-gcp.c"
+    PHP_MONGODB_MONGOC_SOURCES="mcd-azure.c mcd-nsinfo.c mcd-rpc.c mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-deprioritized-servers.c mongoc-error.c mongoc-find-and-modify.c mongoc-flags.c mongoc-generation-map.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-opcode.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-shared.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-ts-pool.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-concern.c service-gcp.c"
     PHP_MONGODB_UTF8PROC_SOURCES="utf8proc.c"
     PHP_MONGODB_ZLIB_SOURCES="adler32.c compress.c crc32.c deflate.c gzclose.c gzlib.c gzread.c gzwrite.c infback.c inffast.c inflate.c inftrees.c trees.c uncompr.c zutil.c"
 
@@ -397,6 +397,7 @@ if test "$PHP_MONGODB" != "no"; then
     PHP_MONGODB_ADD_SOURCES([src/libmongoc/src/libmongoc/src/mongoc/], $PHP_MONGODB_MONGOC_SOURCES, $PHP_MONGODB_BUNDLED_CFLAGS)
 
     PHP_MONGODB_ADD_INCLUDE([src/libmongoc/src/common/])
+    PHP_MONGODB_ADD_INCLUDE([src/libmongoc/src/uthash/])
     PHP_MONGODB_ADD_INCLUDE([src/libmongoc/src/libbson/src/])
     PHP_MONGODB_ADD_INCLUDE([src/libmongoc/src/libbson/src/jsonsl/])
     PHP_MONGODB_ADD_INCLUDE([src/libmongoc/src/libmongoc/src/])
diff --git a/config.w32 b/config.w32
index e0ce9da60..bb46052fc 100644
--- a/config.w32
+++ b/config.w32
@@ -103,9 +103,11 @@ if (PHP_MONGODB != "no") {
     /I" + configure_module_dirname + "/src/MongoDB/Monitoring \
     /I" + configure_module_dirname + "/src/contrib \
     /I" + configure_module_dirname + "/src/libmongoc/src/common \
+    /I" + configure_module_dirname + "/src/libmongoc/src/uthash \
     /I" + configure_module_dirname + "/src/libmongoc/src/libbson/src \
     /I" + configure_module_dirname + "/src/libmongoc/src/libbson/src/jsonsl \
     /I" + configure_module_dirname + "/src/libmongoc/src/libmongoc/src \
+    /I" + configure_module_dirname + "/src/libmongoc/src/libmongoc/src/mongoc \
     /I" + configure_module_dirname + "/src/libmongoc/src/utf8proc-2.8.0 \
   ";
 
@@ -117,7 +119,7 @@ if (PHP_MONGODB != "no") {
   var PHP_MONGODB_KMS_MESSAGE_SOURCES="hexlify.c kms_azure_request.c kms_b64.c kms_caller_identity_request.c kms_crypto_apple.c kms_crypto_libcrypto.c kms_crypto_none.c kms_crypto_windows.c kms_decrypt_request.c kms_encrypt_request.c kms_gcp_request.c kms_kmip_reader_writer.c kms_kmip_request.c kms_kmip_response.c kms_kmip_response_parser.c kms_kv_list.c kms_message.c kms_port.c kms_request.c kms_request_opt.c kms_request_str.c kms_response.c kms_response_parser.c sort.c";
   var PHP_MONGODB_BSON_SOURCES="bcon.c bson-atomic.c bson.c bson-clock.c bson-context.c bson-decimal128.c bson-error.c bson-iso8601.c bson-iter.c bson-json.c bson-keys.c bson-md5.c bson-memory.c bson-oid.c bson-reader.c bson-string.c bson-timegm.c bson-utf8.c bson-value.c bson-version-functions.c bson-writer.c";
   var PHP_MONGODB_JSONSL_SOURCES="jsonsl.c";
-  var PHP_MONGODB_MONGOC_SOURCES="mcd-azure.c mcd-rpc.c mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-deprioritized-servers.c mongoc-error.c mongoc-find-and-modify.c mongoc-flags.c mongoc-generation-map.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-opcode.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-shared.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-ts-pool.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-concern.c service-gcp.c";
+  var PHP_MONGODB_MONGOC_SOURCES="mcd-azure.c mcd-nsinfo.c mcd-rpc.c mongoc-aggregate.c mongoc-apm.c mongoc-array.c mongoc-async.c mongoc-async-cmd.c mongoc-buffer.c mongoc-bulk-operation.c mongoc-change-stream.c mongoc-client.c mongoc-client-pool.c mongoc-client-session.c mongoc-client-side-encryption.c mongoc-cluster-aws.c mongoc-cluster.c mongoc-cluster-cyrus.c mongoc-cluster-sasl.c mongoc-cluster-sspi.c mongoc-cmd.c mongoc-collection.c mongoc-compression.c mongoc-counters.c mongoc-crypt.c mongoc-crypto.c mongoc-crypto-cng.c mongoc-crypto-common-crypto.c mongoc-crypto-openssl.c mongoc-cursor-array.c mongoc-cursor.c mongoc-cursor-change-stream.c mongoc-cursor-cmd.c mongoc-cursor-cmd-deprecated.c mongoc-cursor-find.c mongoc-cursor-find-cmd.c mongoc-cursor-find-opquery.c mongoc-cursor-legacy.c mongoc-cyrus.c mongoc-database.c mongoc-deprioritized-servers.c mongoc-error.c mongoc-find-and-modify.c mongoc-flags.c mongoc-generation-map.c mongoc-gridfs-bucket.c mongoc-gridfs-bucket-file.c mongoc-gridfs.c mongoc-gridfs-file.c mongoc-gridfs-file-list.c mongoc-gridfs-file-page.c mongoc-handshake.c mongoc-host-list.c mongoc-http.c mongoc-index.c mongoc-init.c mongoc-interrupt.c mongoc-libressl.c mongoc-linux-distro-scanner.c mongoc-list.c mongoc-log.c mongoc-matcher.c mongoc-matcher-op.c mongoc-memcmp.c mongoc-ocsp-cache.c mongoc-opcode.c mongoc-openssl.c mongoc-optional.c mongoc-opts.c mongoc-opts-helpers.c mongoc-queue.c mongoc-rand-cng.c mongoc-rand-common-crypto.c mongoc-rand-openssl.c mongoc-read-concern.c mongoc-read-prefs.c mongoc-rpc.c mongoc-sasl.c mongoc-scram.c mongoc-secure-channel.c mongoc-secure-transport.c mongoc-server-api.c mongoc-server-description.c mongoc-server-monitor.c mongoc-server-stream.c mongoc-set.c mongoc-shared.c mongoc-socket.c mongoc-ssl.c mongoc-sspi.c mongoc-stream-buffered.c mongoc-stream.c mongoc-stream-file.c mongoc-stream-gridfs.c mongoc-stream-gridfs-download.c mongoc-stream-gridfs-upload.c mongoc-stream-socket.c mongoc-stream-tls.c mongoc-stream-tls-libressl.c mongoc-stream-tls-openssl-bio.c mongoc-stream-tls-openssl.c mongoc-stream-tls-secure-channel.c mongoc-stream-tls-secure-transport.c mongoc-timeout.c mongoc-topology-background-monitoring.c mongoc-topology.c mongoc-topology-description-apm.c mongoc-topology-description.c mongoc-topology-scanner.c mongoc-ts-pool.c mongoc-uri.c mongoc-util.c mongoc-version-functions.c mongoc-write-command.c mongoc-write-concern.c service-gcp.c";
   var PHP_MONGODB_UTF8PROC_SOURCES="utf8proc.c";
 
   EXTENSION("mongodb", "php_phongo.c", null, PHP_MONGODB_CFLAGS);
diff --git a/src/LIBMONGOCRYPT_VERSION_CURRENT b/src/LIBMONGOCRYPT_VERSION_CURRENT
index 9ab8337f3..81c871de4 100644
--- a/src/LIBMONGOCRYPT_VERSION_CURRENT
+++ b/src/LIBMONGOCRYPT_VERSION_CURRENT
@@ -1 +1 @@
-1.9.1
+1.10.0
diff --git a/src/LIBMONGOC_VERSION_CURRENT b/src/LIBMONGOC_VERSION_CURRENT
index c7c3f3333..5db08bf2d 100644
--- a/src/LIBMONGOC_VERSION_CURRENT
+++ b/src/LIBMONGOC_VERSION_CURRENT
@@ -1 +1 @@
-1.26.2
+1.27.0
diff --git a/src/libmongoc b/src/libmongoc
index 586171d66..dfd3aece9 160000
--- a/src/libmongoc
+++ b/src/libmongoc
@@ -1 +1 @@
-Subproject commit 586171d661f584d841bdc32fc998e9f6cf903228
+Subproject commit dfd3aece9e46ffcfac3e41cc147036872757c2c2
diff --git a/src/libmongocrypt b/src/libmongocrypt
index 475deb754..940cdb252 160000
--- a/src/libmongocrypt
+++ b/src/libmongocrypt
@@ -1 +1 @@
-Subproject commit 475deb7544381fb0b8f361e8c80948c8d67cc4cd
+Subproject commit 940cdb252c3c21ab15984a070ddca70806d4c63f