diff --git a/test/docker/Gopkg.toml b/test/docker/Gopkg.toml
index 5b536ea..d13cde4 100644
--- a/test/docker/Gopkg.toml
+++ b/test/docker/Gopkg.toml
@@ -18,7 +18,7 @@
 
 [[constraint]]
   name = "github.com/docker/go-connections"
+  version = "0.3.0"
 
 [prune]
-  unused-packages = true
   go-tests = true