diff --git a/README.md b/README.md
index ea5a7597..3c068fce 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,18 @@
 - Persistent session
 - Load PureScript code from Github Gists
 
+### Which Libraries are Available?
+
+Try PureScript aims to provide a complete, recent package set from <https://github.com/purescript/package-sets>. The available libraries are those listed in `staging/spago.dhall`, at the versions in the package set mentioned in `staging/packages.dhall`.
+
+To update to a more recent package set, first update the `upstream` package set in `staging/packages.dhall`, and then run:
+
+```
+$ spago ls packages | cut -f 1 -d ' ' | xargs spago install
+```
+
+to install every package in the set. Before deploying an updated package set, someone should check that the memory required to hold the package set's externs files does not exceed that of the try.purescript.org server.
+
 ### Control Features via the Query String
 
 Most of these features can be controlled not only from the toolbar, but also using the [query parameters](https://en.wikipedia.org/wiki/Query_string):
diff --git a/client/src/Try/Shim.purs b/client/src/Try/Shim.purs
index cacf0617..b6608b78 100644
--- a/client/src/Try/Shim.purs
+++ b/client/src/Try/Shim.purs
@@ -12,16 +12,28 @@ type Shim =
 shims :: Object Shim
 shims = Object.fromFoldable
   [ Tuple "react"
-      { url: "https://unpkg.com/react@16.13.0/umd/react.development.js"
+      { url: "https://unpkg.com/react@16.13.1/umd/react.development.js"
       , deps: []
       }
   , Tuple "react-dom"
-      { url: "https://unpkg.com/react-dom@16.13.0/umd/react-dom.development.js"
+      { url: "https://unpkg.com/react-dom@16.13.1/umd/react-dom.development.js"
       , deps: [ "react" ]
       }
   , Tuple "react-dom/server"
-      { url: "https://unpkg.com/react-dom@16.13.0/umd/react-dom-server.browser.development.js"
+      { url: "https://unpkg.com/react-dom@16.13.1/umd/react-dom-server.browser.development.js"
       , deps: [ "react" ]
       }
+  , Tuple "big-integer"
+      { url: "https://unpkg.com/big-integer@1.6.48/BigInteger.min.js"
+      , deps: []
+      }
+  , Tuple "decimal.js"
+      { url: "https://unpkg.com/decimal.js@10.2.0/decimal.min.js"
+      , deps: []
+      }
+  , Tuple "uuid"
+      { url: "https://cdnjs.cloudflare.com/ajax/libs/uuid/8.1.0/uuid.min.js"
+      , deps: []
+      }
   ]
 
diff --git a/deploy/start b/deploy/start
index ced2cfa1..4ea236a4 100755
--- a/deploy/start
+++ b/deploy/start
@@ -4,4 +4,4 @@ set -ex
 set -o noglob
 export XDG_CACHE_HOME=.spago-cache
 spago install
-exec trypurescript +RTS -N1 -A128m -M750M -RTS 8081 $(spago sources)
+exec trypurescript +RTS -N2 -A128m -M3G -RTS 8081 $(spago sources)
diff --git a/staging/packages.dhall b/staging/packages.dhall
index 83881b1b..82eb86f7 100644
--- a/staging/packages.dhall
+++ b/staging/packages.dhall
@@ -1,5 +1,5 @@
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.6-20200404/packages.dhall sha256:f239f2e215d0cbd5c203307701748581938f74c4c78f4aeffa32c11c131ef7b6
+      https://github.com/purescript/package-sets/releases/download/psc-0.13.6-20200507/packages.dhall sha256:9c1e8951e721b79de1de551f31ecb5a339e82bbd43300eb5ccfb1bf8cf7bbd62
 
 let overrides = {=}
 
diff --git a/staging/spago.dhall b/staging/spago.dhall
index 35c47afa..e152f0b6 100644
--- a/staging/spago.dhall
+++ b/staging/spago.dhall
@@ -1,52 +1,374 @@
 { name = "try-purescript-server"
 , dependencies =
-    [ "arrays"
-    , "bifunctors"
-    , "console"
-    , "const"
-    , "contravariant"
-    , "control"
-    , "distributive"
-    , "effect"
-    , "either"
-    , "enums"
-    , "exceptions"
-    , "exists"
-    , "foldable-traversable"
-    , "foreign"
-    , "foreign-object"
-    , "free"
-    , "functions"
-    , "functors"
-    , "generics-rep"
-    , "globals"
-    , "identity"
-    , "integers"
-    , "lazy"
-    , "math"
-    , "maybe"
-    , "ordered-collections"
-    , "prelude"
-    , "profunctor"
-    , "proxy"
-    , "quickcheck"
-    , "random"
-    , "react"
-    , "react-dom"
-    , "record"
-    , "refs"
-    , "semirings"
-    , "st"
-    , "strings"
-    , "tailrec"
-    , "transformers"
-    , "tuples"
-    , "typelevel-prelude"
-    , "unfoldable"
-    , "validation"
-    , "web-dom"
-    , "web-html"
-    ]
+  [ "abides"
+  , "aff"
+  , "aff-bus"
+  , "aff-coroutines"
+  , "aff-promise"
+  , "aff-retry"
+  , "affjax"
+  , "ansi"
+  , "argonaut"
+  , "argonaut-codecs"
+  , "argonaut-core"
+  , "argonaut-generic"
+  , "argonaut-traversals"
+  , "array-views"
+  , "arraybuffer"
+  , "arraybuffer-class"
+  , "arraybuffer-types"
+  , "arrays"
+  , "assert"
+  , "avar"
+  , "b64"
+  , "basic-auth"
+  , "behaviors"
+  , "bifunctors"
+  , "bigints"
+  , "bip39"
+  , "biscotti-cookie"
+  , "biscotti-session"
+  , "bower-json"
+  , "bucketchain"
+  , "bucketchain-basic-auth"
+  , "bucketchain-conditional"
+  , "bucketchain-cors"
+  , "bucketchain-csrf"
+  , "bucketchain-header-utils"
+  , "bucketchain-health"
+  , "bucketchain-history-api-fallback"
+  , "bucketchain-logger"
+  , "bucketchain-secure"
+  , "bucketchain-simple-api"
+  , "bucketchain-sslify"
+  , "bucketchain-static"
+  , "byte-codec"
+  , "bytestrings"
+  , "call-by-name"
+  , "canvas"
+  , "cartesian"
+  , "catenable-lists"
+  , "checked-exceptions"
+  , "cheerio"
+  , "chirashi"
+  , "choco-pie"
+  , "codec"
+  , "codec-argonaut"
+  , "colors"
+  , "concur-core"
+  , "concur-react"
+  , "console"
+  , "const"
+  , "contravariant"
+  , "control"
+  , "coroutines"
+  , "crypto"
+  , "css"
+  , "cssom"
+  , "data-algebrae"
+  , "datetime"
+  , "debug"
+  , "decimals"
+  , "distributive"
+  , "dom-filereader"
+  , "dom-indexed"
+  , "dotenv"
+  , "drawing"
+  , "effect"
+  , "either"
+  , "email-validate"
+  , "encoding"
+  , "enums"
+  , "errors"
+  , "event"
+  , "exceptions"
+  , "exists"
+  , "exitcodes"
+  , "expect-inferred"
+  , "express"
+  , "filterable"
+  , "fixed-points"
+  , "fixed-precision"
+  , "flare"
+  , "float32"
+  , "flow-id"
+  , "foldable-traversable"
+  , "folds"
+  , "foreign"
+  , "foreign-generic"
+  , "foreign-object"
+  , "fork"
+  , "form-urlencoded"
+  , "format"
+  , "format-nix"
+  , "formatters"
+  , "free"
+  , "freeap"
+  , "freedom"
+  , "freedom-now"
+  , "freedom-portal"
+  , "freedom-router"
+  , "freedom-transition"
+  , "freedom-virtualized"
+  , "freedom-window-resize"
+  , "freet"
+  , "functions"
+  , "functors"
+  , "fuzzy"
+  , "gen"
+  , "generics-rep"
+  , "globals"
+  , "gomtang-basic"
+  , "group"
+  , "halogen"
+  , "halogen-bootstrap"
+  , "halogen-bootstrap4"
+  , "halogen-css"
+  , "halogen-formless"
+  , "halogen-hooks"
+  , "halogen-hooks-extra"
+  , "halogen-select"
+  , "halogen-storybook"
+  , "halogen-vdom"
+  , "heterogeneous"
+  , "higher-order"
+  , "html-parser-halogen"
+  , "http-methods"
+  , "httpure"
+  , "httpure-contrib-biscotti"
+  , "hyper"
+  , "hypertrout"
+  , "identity"
+  , "identy"
+  , "indexed-monad"
+  , "inflection"
+  , "int-53"
+  , "integers"
+  , "interpolate"
+  , "invariant"
+  , "jajanmen"
+  , "jquery"
+  , "js-date"
+  , "js-timers"
+  , "json-pointer"
+  , "json-schema"
+  , "jwt"
+  , "kancho"
+  , "kishimen"
+  , "lazy"
+  , "lcg"
+  , "leibniz"
+  , "lenient-html-parser"
+  , "lists"
+  , "logging"
+  , "logging-journald"
+  , "machines"
+  , "makkori"
+  , "math"
+  , "matrices"
+  , "maybe"
+  , "media-types"
+  , "memoize"
+  , "metadata"
+  , "milkis"
+  , "minibench"
+  , "mmorph"
+  , "monad-control"
+  , "monad-logger"
+  , "monad-loops"
+  , "monad-unlift"
+  , "money"
+  , "motsunabe"
+  , "mysql"
+  , "naporitan"
+  , "naturals"
+  , "newtype"
+  , "node-buffer"
+  , "node-child-process"
+  , "node-electron"
+  , "node-fs"
+  , "node-fs-aff"
+  , "node-he"
+  , "node-http"
+  , "node-net"
+  , "node-path"
+  , "node-postgres"
+  , "node-process"
+  , "node-readline"
+  , "node-sqlite3"
+  , "node-streams"
+  , "node-telegram-bot-api"
+  , "node-url"
+  , "nodemailer"
+  , "nodetrout"
+  , "nonempty"
+  , "now"
+  , "nullable"
+  , "numbers"
+  , "option"
+  , "options"
+  , "optparse"
+  , "ordered-collections"
+  , "ordered-set"
+  , "orders"
+  , "pairing"
+  , "pairs"
+  , "parallel"
+  , "parseint"
+  , "parsing"
+  , "partial"
+  , "pathy"
+  , "phoenix"
+  , "pipes"
+  , "pointed-list"
+  , "polyform"
+  , "polyform-validators"
+  , "posix-types"
+  , "precise-datetime"
+  , "prelude"
+  , "prettier"
+  , "profunctor"
+  , "profunctor-lenses"
+  , "promises"
+  , "proxy"
+  , "proxying"
+  , "psa-utils"
+  , "psc-ide"
+  , "psci-support"
+  , "quantities"
+  , "querydsl"
+  , "queue"
+  , "quickcheck"
+  , "quickcheck-combinators"
+  , "quickcheck-laws"
+  , "quotient"
+  , "radox"
+  , "random"
+  , "rationals"
+  , "rave"
+  , "react"
+  , "react-basic"
+  , "react-basic-hooks"
+  , "react-basic-native"
+  , "react-dom"
+  , "react-queue"
+  , "react-radox"
+  , "react-stylesheet"
+  , "read"
+  , "record"
+  , "record-extra"
+  , "record-format"
+  , "redis-client"
+  , "redis-hotqueue"
+  , "redux-devtools"
+  , "refined"
+  , "refs"
+  , "remotedata"
+  , "result"
+  , "ring-modules"
+  , "routing"
+  , "routing-duplex"
+  , "row-extra"
+  , "run"
+  , "run-profunctor-lenses"
+  , "run-streaming"
+  , "safely"
+  , "scrypt"
+  , "search-trie"
+  , "selection-foldable"
+  , "selective"
+  , "semirings"
+  , "server-sent-events"
+  , "setimmediate"
+  , "shoronpo"
+  , "signal"
+  , "sijidou"
+  , "simple-emitter"
+  , "simple-i18n"
+  , "simple-json"
+  , "simple-json-generics"
+  , "simple-json-utils"
+  , "simple-jwt"
+  , "simple-timestamp"
+  , "sized-matrices"
+  , "sized-vectors"
+  , "sjcl"
+  , "slug"
+  , "smolder"
+  , "snabbdom"
+  , "sodium"
+  , "spec"
+  , "spec-discovery"
+  , "spec-quickcheck"
+  , "spork"
+  , "st"
+  , "string-parsers"
+  , "strings"
+  , "strings-extra"
+  , "stringutils"
+  , "struct"
+  , "stylesheet"
+  , "subcategory"
+  , "subtlecrypto"
+  , "suggest"
+  , "sunde"
+  , "svg-parser"
+  , "svg-parser-halogen"
+  , "systemd-journald"
+  , "tailrec"
+  , "test-unit"
+  , "text-encoding"
+  , "thermite"
+  , "thermite-dom"
+  , "these"
+  , "tolerant-argonaut"
+  , "toppokki"
+  , "tortellini"
+  , "transformers"
+  , "trout"
+  , "trout-client"
+  , "tuples"
+  , "tuples-native"
+  , "type-equality"
+  , "type-isequal"
+  , "typedenv"
+  , "typelevel"
+  , "typelevel-peano"
+  , "typelevel-prelude"
+  , "typelevel-rowlist-limits"
+  , "uint"
+  , "uint-instances"
+  , "undefinable"
+  , "undefined"
+  , "undefined-or"
+  , "unfoldable"
+  , "unicode"
+  , "unordered-collections"
+  , "unorm"
+  , "unsafe-coerce"
+  , "unsafe-reference"
+  , "uri"
+  , "uuid"
+  , "validation"
+  , "variant"
+  , "vectorfield"
+  , "web-clipboard"
+  , "web-dom"
+  , "web-events"
+  , "web-file"
+  , "web-html"
+  , "web-socket"
+  , "web-storage"
+  , "web-touchevents"
+  , "web-uievents"
+  , "web-xhr"
+  , "websocket-moderate"
+  , "xiaomian"
+  , "yargs"
+  , "z85"
+  , "zeta"
+  , "zeta-extra"
+  ]
 , packages = ./packages.dhall
 , sources = [ "src/**/*.purs" ]
 }