diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36f2886..4643202 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
  - Fix gitlab #8: Push tags only pushed tags, not actual commit.
  - Fix gitlab #9: Make commit message configurable.
  - Fix gitlab #11: Show regexp when `--verbose` is used.
+ - Fix: Disallow `--release=dev` which has different semantics than other release tags.
  - Switch main repo from gitlab to github.
 
 
diff --git a/src/pycalver/__main__.py b/src/pycalver/__main__.py
index 26d3bb8..3fa3708 100755
--- a/src/pycalver/__main__.py
+++ b/src/pycalver/__main__.py
@@ -69,7 +69,7 @@ def _configure_logging(verbose: int = 0) -> None:
     logger.debug("Logging configured.")
 
 
-VALID_RELEASE_VALUES = ("alpha", "beta", "dev", "rc", "post", "final")
+VALID_RELEASE_VALUES = ("alpha", "beta", "rc", "post", "final")
 
 
 _current_date = dt.date.today().isoformat()
diff --git a/test/test_patterns.py b/test/test_patterns.py
index 2621fc4..e51be13 100644
--- a/test/test_patterns.py
+++ b/test/test_patterns.py
@@ -130,14 +130,12 @@ V2_PART_PATTERN_CASES = [
     (['RELEASE'], "alpha" , "alpha"),
     (['RELEASE'], "alfa"  , None),
     (['RELEASE'], "beta"  , "beta"),
-    (['RELEASE'], "dev"   , "dev"),
     (['RELEASE'], "rc"    , "rc"),
     (['RELEASE'], "post"  , "post"),
     (['RELEASE'], "final" , "final"),
     (['RELEASE'], "latest", None),
     (['PYTAG'  ], "a"     , "a"),
     (['PYTAG'  ], "b"     , "b"),
-    (['PYTAG'  ], "dev"   , "dev"),
     (['PYTAG'  ], "rc"    , "rc"),
     (['PYTAG'  ], "post"  , "post"),
     (['PYTAG'  ], "post"  , "post"),