diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+2024-05-07
+        * Version bump (3.19.1). (#512)
+
 2024-03-07
         * Version bump (3.19). (#504)
 
diff --git a/copilot-language.cabal b/copilot-language.cabal
--- a/copilot-language.cabal
+++ b/copilot-language.cabal
@@ -1,6 +1,6 @@
 cabal-version:       >=1.10
 name:                copilot-language
-version:             3.19
+version:             3.19.1
 synopsis:            A Haskell-embedded DSL for monitoring hard real-time
                      distributed systems.
 description:
@@ -35,16 +35,16 @@
 library
   default-language: Haskell2010
   hs-source-dirs: src
-  build-depends: base                  >= 4.9 && < 5
+  build-depends: base                  >= 4.9    && < 5
 
-               , array                 >= 0.5 && < 0.6
-               , containers            >= 0.4 && < 0.7
-               , data-reify            >= 0.6 && < 0.7
-               , mtl                   >= 2.0 && < 3
+               , array                 >= 0.5    && < 0.6
+               , containers            >= 0.4    && < 0.7
+               , data-reify            >= 0.6    && < 0.7
+               , mtl                   >= 2.0    && < 3
 
-               , copilot-core          >= 3.19 && < 3.20
-               , copilot-interpreter   >= 3.19 && < 3.20
-               , copilot-theorem       >= 3.19 && < 3.20
+               , copilot-core          >= 3.19.1 && < 3.20
+               , copilot-interpreter   >= 3.19.1 && < 3.20
+               , copilot-theorem       >= 3.19.1 && < 3.20
 
   exposed-modules: Copilot.Language
                  , Copilot.Language.Operators.BitWise