diff --git a/opam b/opam
index 7065e6d4f..59131658e 100644
--- a/opam
+++ b/opam
@@ -22,6 +22,6 @@ depends: [
   "ocamlfind"
   "camlp5" {= "7.03"}
   "ostap" {= "0.3"}
-  "GT" {= "0.01"}
+  "GT" {= "0.0.1"}
   "re" {= "1.7.1"}
 ]
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