diff --git a/CHANGELOG b/CHANGELOG
index 0db628d..2646061 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,5 @@
-2025-03-20
+2025-05-05
+        * Version bump (4.3.1). (#41)
         * Move Copilot.Compile.Bluespec.External out of shared directory. (#36)
         * Allow building with filepath-1.5.*. (#39)
 
diff --git a/copilot-bluespec.cabal b/copilot-bluespec.cabal
index d1a63d9..8b77d46 100644
--- a/copilot-bluespec.cabal
+++ b/copilot-bluespec.cabal
@@ -1,6 +1,6 @@
 cabal-version             : >= 1.10
 name                      : copilot-bluespec
-version                   : 4.3
+version                   : 4.3.1
 synopsis                  : A compiler for Copilot targeting FPGAs.
 description               :
   This package is a back-end from Copilot to FPGAs in Bluespec.