diff --git a/bindings/python/requirements.txt b/bindings/python/requirements.txt
index 512443264..0e465d5ef 100644
--- a/bindings/python/requirements.txt
+++ b/bindings/python/requirements.txt
@@ -3,4 +3,4 @@
 open-space-toolkit-core~=4.1
 open-space-toolkit-io~=4.0
 open-space-toolkit-mathematics~=4.3
-open-space-toolkit-physics~=11.1
+open-space-toolkit-physics~=10.1