diff --git a/imag-ref/Cargo.toml b/imag-ref/Cargo.toml
index 9e2da2ba..c23cd63b 100644
--- a/imag-ref/Cargo.toml
+++ b/imag-ref/Cargo.toml
@@ -14,7 +14,7 @@ repository    = "https://github.com/matthiasbeyer/imag"
 homepage      = "http://imag-pim.org"
 
 [dependencies]
-semver = "0.2.1"
+semver = "0.5.1"
 clap = "2.*"
 log = "0.3"
 version = "2.0.1"