diff --git a/requirements-dev.txt b/requirements-dev.txt
index 23d5741..fa3bd7a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
 --requirement requirements-test.txt
 ipython
 # The bump-version script requires at least version 3 of semver.
-semver>=3
+semver>=3.0.4