diff --git a/CMakeLists.txt b/CMakeLists.txt
index 194618cd7..45b2feeca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@
 
 # Top level CMake file that defines the entire Firebase C++ SDK build.
 
-cmake_minimum_required (VERSION 3.1)
+cmake_minimum_required (VERSION 3.5)
 
 set (CMAKE_CXX_STANDARD 14)
 set (CMAKE_CXX_STANDARD_REQUIRED YES)  # Don't fall back to an earlier version.
diff --git a/app/rest/CMakeLists.txt b/app/rest/CMakeLists.txt
index 8d58c94f9..0bfeb82f7 100644
--- a/app/rest/CMakeLists.txt
+++ b/app/rest/CMakeLists.txt
@@ -14,7 +14,7 @@
 
 # CMake file for the firebase_rest_lib library
 
-cmake_minimum_required (VERSION 3.1)
+cmake_minimum_required (VERSION 3.5)
 # Firebase C++ SDK requires C++14.
 set (CMAKE_CXX_STANDARD 14)
 set (CMAKE_CXX_STANDARD_REQUIRED YES)  # Don't fall back to an earlier version.
diff --git a/ios_pod/empty_CMakeLists.txt b/ios_pod/empty_CMakeLists.txt
index b332c81e7..911bf4ea5 100644
--- a/ios_pod/empty_CMakeLists.txt
+++ b/ios_pod/empty_CMakeLists.txt
@@ -14,7 +14,7 @@
 
 # Stub cmake project to enable pod files to be installed against
 
-cmake_minimum_required (VERSION 3.1)
+cmake_minimum_required (VERSION 3.5)
 
 project (GetPods CXX)
 add_library(GetPods empty.cc)
diff --git a/release_build_files/CMakeLists.txt b/release_build_files/CMakeLists.txt
index e9e341e0a..aedd24737 100644
--- a/release_build_files/CMakeLists.txt
+++ b/release_build_files/CMakeLists.txt
@@ -14,7 +14,7 @@
 
 # Top level CMake file that defines targets for the Firebase C++ SDK.
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 include(FindPkgConfig)
 
diff --git a/testing/CMakeLists.txt b/testing/CMakeLists.txt
index 56c07e25b..c44ae778d 100644
--- a/testing/CMakeLists.txt
+++ b/testing/CMakeLists.txt
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cmake_minimum_required (VERSION 3.1)
+cmake_minimum_required (VERSION 3.5)
 set (CMAKE_CXX_STANDARD 14)
 set (CMAKE_CXX_STANDARD_REQUIRED YES)  # Don't fall back to an earlier version.