diff --git a/src/univers/gem.py b/src/univers/gem.py
index b59d32aa..cbd47f7c 100644
--- a/src/univers/gem.py
+++ b/src/univers/gem.py
@@ -225,7 +225,7 @@ def equal_strictly(self, other):
         return self.version == other.version
 
     def __hash__(self):
-        return hash(self.canonical_segments)
+        return hash(tuple(self.canonical_segments))
 
     def __eq__(self, other):
         return self.canonical_segments == other.canonical_segments
@@ -321,7 +321,7 @@ def get_segments(self):
     def canonical_segments(self):
         if not self._canonical_segments:
             self._canonical_segments = self.get_canonical_segments()
-        return list(self._canonical_segments)
+        return tuple(self._canonical_segments)
 
     def get_canonical_segments(self):
         """
diff --git a/tests/test_rubygems_gem_version.py b/tests/test_rubygems_gem_version.py
index 6c14a00d..63c27f44 100644
--- a/tests/test_rubygems_gem_version.py
+++ b/tests/test_rubygems_gem_version.py
@@ -181,9 +181,13 @@ def test_split_segments():
 
 
 def test_canonical_segments():
-    assert GemVersion("1.0.0").canonical_segments == [1]
-    assert GemVersion("1.0.0.a.1.0").canonical_segments == [1, "a", 1]
-    assert GemVersion("1.2.3-1").canonical_segments == [1, 2, 3, "pre", 1]
+    assert GemVersion("1.0.0").canonical_segments == (1,)
+    assert GemVersion("1.0.0.a.1.0").canonical_segments == (1, "a", 1)
+    assert GemVersion("1.2.3-1").canonical_segments == (1, 2, 3, "pre", 1)
+
+
+def test_GemVersion_is_hashable():
+    hash(GemVersion("1.0.0"))
 
 
 def test_frozen_version():