diff --git a/opentracing-zipkin-v1.cabal b/opentracing-zipkin-v1.cabal
--- a/opentracing-zipkin-v1.cabal
+++ b/opentracing-zipkin-v1.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.2
 
 name:           opentracing-zipkin-v1
-version:        0.3.0
+version:        0.3.0.1
 synopsis:       Zipkin V1 backend for OpenTracing
 homepage:       https://github.com/kim/opentracing
 bug-reports:    https://github.com/kim/opentracing/issues
@@ -40,7 +40,7 @@
     -Wnoncanonical-monad-instances
   build-depends:
       QuickCheck >= 2.14
-    , base >= 4.9 && < 4.19
+    , base >= 4.9 && < 5
     , bytestring >= 0.10
     , exceptions >= 0.8
     , hashable >= 1.2