diff --git a/requirements.txt b/requirements.txt
index 5e69829..78168f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-mo-future
-mo-dots
-mo-parsing
-mo-imports
+mo-future=6.2.21303
+mo-dots=9.173.22126
+mo-parsing=8.183.22158
+mo-imports=7.169.22121
 dataclasses; python_version < '3.7'
 readline; sys_platform == 'linux'
 numpy