diff --git a/cabal-testsuite/cabal-testsuite.cabal b/cabal-testsuite/cabal-testsuite.cabal
index 55eebde5377c9e73efb33842e69d1ba2e24ff8f2..fd2689bd1725cec7b157a6355bad77b5aed14d64 100644
--- a/cabal-testsuite/cabal-testsuite.cabal
+++ b/cabal-testsuite/cabal-testsuite.cabal
@@ -28,7 +28,7 @@ common shared
   build-depends:
     , base >= 4.6 && <4.16
     -- this needs to match the in-tree lib:Cabal version
-    , Cabal ^>= 3.6.0.0
+    , Cabal == 3.6.0.0
 
   ghc-options: -Wall -fwarn-tabs -fwarn-incomplete-uni-patterns
 
diff --git a/vendor/cabal-doctest-1.0.8/cabal-doctest.cabal b/vendor/cabal-doctest-1.0.8/cabal-doctest.cabal
index 816f7debd1440fb08b7a3dc4da7517b7714ea4a0..11602c9b5a7cf6e098086c8ca108955868f26cff 100644
--- a/vendor/cabal-doctest-1.0.8/cabal-doctest.cabal
+++ b/vendor/cabal-doctest-1.0.8/cabal-doctest.cabal
@@ -1,5 +1,5 @@
 name:               cabal-doctest
-version:            1.0.9
+version:            1.0.8
 x-revision:         2
 synopsis:           A Setup.hs helper for doctests running
 description: