diff --git a/sandwich-contexts/package.yaml b/sandwich-contexts/package.yaml
index 926f93e1..e9c533a4 100644
--- a/sandwich-contexts/package.yaml
+++ b/sandwich-contexts/package.yaml
@@ -7,7 +7,7 @@ author: Tom McLaughlin
 maintainer: tom@codedown.io
 copyright: 2024 Tom McLaughlin
 dependencies:
-- base
+- base >= 4.11 && < 5
 - sandwich >= 0.3.0.0
 - unliftio
 
diff --git a/sandwich-contexts/sandwich-contexts.cabal b/sandwich-contexts/sandwich-contexts.cabal
index d0023af9..eb0b917e 100644
--- a/sandwich-contexts/sandwich-contexts.cabal
+++ b/sandwich-contexts/sandwich-contexts.cabal
@@ -53,7 +53,7 @@ library
   build-depends:
       HTTP
     , aeson
-    , base
+    , base >=4.11 && <5
     , conduit
     , conduit-extra
     , containers
@@ -117,7 +117,7 @@ test-suite tests
   build-tool-depends:
       sandwich:sandwich-discover
   build-depends:
-      base
+      base >=4.11 && <5
     , filepath
     , postgresql-simple
     , relude