diff --git a/co-log-core.cabal b/co-log-core.cabal
index 80e6893..d597392 100644
--- a/co-log-core.cabal
+++ b/co-log-core.cabal
@@ -101,5 +101,5 @@ test-suite doctest
   type:                 exitcode-stdio-1.0
   hs-source-dirs:       test
   main-is:              Doctests.hs
-  build-depends:        doctest >= 0.16.0 && < 0.22
+  build-depends:        doctest >= 0.16.0 && < 0.23
                       , Glob ^>= 0.10.0