diff --git a/servant-swagger/servant-swagger.cabal b/servant-swagger/servant-swagger.cabal
index cacac740..d2c0bef7 100644
--- a/servant-swagger/servant-swagger.cabal
+++ b/servant-swagger/servant-swagger.cabal
@@ -92,7 +92,7 @@ test-suite doctests
   build-depends:
     base,
     directory >= 1.0,
-    doctest >= 0.18 && <0.19,
+    doctest >= 0.17 && <0.19,
     servant,
     QuickCheck,
     filepath