diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+2021-07-07
+        * Version bump (3.4). (#231)
+
 2021-05-07
         * Version bump (3.3). (#217)
 
diff --git a/copilot-libraries.cabal b/copilot-libraries.cabal
--- a/copilot-libraries.cabal
+++ b/copilot-libraries.cabal
@@ -1,6 +1,6 @@
 cabal-version:       >=1.10
 name:                copilot-libraries
-version:             3.3
+version:             3.4
 synopsis:            Libraries for the Copilot language.
 description:
   Libraries for the Copilot language.
@@ -40,7 +40,7 @@
                , data-reify       >= 0.6 && < 0.7
                , mtl              >= 2.0 && < 2.3
                , parsec           >= 2.0 && < 3.2
-               , copilot-language >= 3.3 && < 3.4
+               , copilot-language >= 3.4 && < 3.5
 
   exposed-modules:
       Copilot.Library.Libraries