diff --git a/requirements_chemprop.txt b/requirements_chemprop.txt
index df9043b4..46a82d16 100644
--- a/requirements_chemprop.txt
+++ b/requirements_chemprop.txt
@@ -1,2 +1,2 @@
-chemprop>=2.0.3
-lightning
\ No newline at end of file
+chemprop==2.0.3
+lightning