diff --git a/Dockerfile b/Dockerfile
index eb31883..c85d72a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM haskell:9.8.4-slim-bullseye
+FROM haskell:9.12.2-slim-bookworm
 
 ARG UID=1000
 ARG GID=1000
diff --git a/haskell-playground.cabal b/haskell-playground.cabal
index a120868..7b9d5fd 100644
--- a/haskell-playground.cabal
+++ b/haskell-playground.cabal
@@ -8,7 +8,7 @@ executable haskell-playground
     main-is:          Main.hs
     build-depends:
         primes,
-        base ^>=4.19.2.0
+        base ^>=4.21.0.0
     other-modules:
         Primes
         Problems