diff --git a/csp-lmc-common/setup.py b/csp-lmc-common/setup.py
index fe39353f0143f6501bbe343db614addec4ace1d4..9a36b7d66b139f527cc9f3fa8345cb44903441f8 100644
--- a/csp-lmc-common/setup.py
+++ b/csp-lmc-common/setup.py
@@ -39,7 +39,7 @@ setup(
             'pytango >=9.3.1',
             'future',
             'ska_logging < 0.3.0',
-            'lmcbaseclasses >=0.5.1',
+            'lmcbaseclasses ==0.5.1',
         ],
         setup_requires=[
             'pytest-runner',