diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+2026-01-07
+        * Version bump (4.6.1). (#705)
+        * Relax version constraint on containers. (#603)
+
 2025-11-07
         * Version bump (4.6). (#679)
 
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:             4.6
+version:             4.6.1
 synopsis:            Libraries for the Copilot language.
 description:
   Libraries for the Copilot language.
@@ -38,10 +38,10 @@
 
   build-depends: base             >= 4.9 && < 5
 
-               , containers       >= 0.4   && < 0.8
+               , containers       >= 0.4   && < 0.9
                , mtl              >= 2.0   && < 2.4
                , parsec           >= 2.0   && < 3.2
-               , copilot-language >= 4.6   && < 4.7
+               , copilot-language >= 4.6.1 && < 4.7
 
   exposed-modules:
       Copilot.Library.Libraries