diff --git a/requirements.txt b/requirements.txt
index d2c5104f..e5c34497 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@ ethereum>=2.0.4
 ZODB>=5.3.0
 z3-solver>=4.5
 web3
-laser-ethereum>=0.1.11
+laser-ethereum==0.1.11
 requests
 BTrees
diff --git a/setup.py b/setup.py
index e4996642..5f5d6656 100755
--- a/setup.py
+++ b/setup.py
@@ -256,7 +256,7 @@ setup(
         'web3',
         'ZODB>=5.3.0',
         'z3-solver>=4.5',
-        'laser-ethereum>=0.1.11',
+        'laser-ethereum==0.1.11',
         'requests',
         'BTrees'
     ],