diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+#### 0.5.0.1
+
+* Allow `primitive 0.6.*`
+
 #### 0.5.0.0
 
 * Add `ApiStateC ExceptT` instance
diff --git a/rest-client.cabal b/rest-client.cabal
--- a/rest-client.cabal
+++ b/rest-client.cabal
@@ -1,5 +1,5 @@
 name:                rest-client
-version:             0.5.0.0
+version:             0.5.0.1
 description:         Utility library for use in generated API client libraries.
 synopsis:            Utility library for use in generated API client libraries.
 maintainer:          code@silk.co
@@ -36,7 +36,7 @@
     , hxt-pickle-utils == 0.1.*
     , monad-control (>= 0.3.3.1 && < 0.4) || (>= 1.0.0.3 && < 1.1)
     , mtl >= 2.0 && < 2.3
-    , primitive == 0.5.*
+    , primitive >= 0.5 && < 0.7
     , resourcet >= 1.1.4 && < 1.2
     , rest-types == 1.13.*
     , tostring == 0.2.*