diff --git a/rebar.config b/rebar.config
index e6c4587..d8959ed 100644
--- a/rebar.config
+++ b/rebar.config
@@ -9,12 +9,12 @@
         {ecrecoverprebuilt,
          {ecrecoverprebuilt_app_with_priv_from_git,
 	  {git, "https://github.com/johnsnewby/ecrecover-prebuilt.git",
-	   {ref, "HEAD"}}}}
+	   {ref, "8e4fcb445c4e781e882e23f5127659f67784628e"}}}}
        ]}.
 
 {plugins, [{rebar_ecrecoverprebuilt_dep,
 	    {git, "https://github.com/johnsnewby/rebar3-ecrecover-prebuilt-plugin.git",
-	    {ref, "HEAD"}}}
+	    {ref, "7a88c7727ee436c849ecabe4ff9d39d15a879d79"}}}
           ]}.
 
 %%{profiles, [{test, [{deps, [{meck, "0.8.12"}]}]}]}.