diff --git a/src/Mod/AddonManager/ALLOWED_PYTHON_PACKAGES.txt b/src/Mod/AddonManager/ALLOWED_PYTHON_PACKAGES.txt
index 55b8c99d62..ceef21f266 100644
--- a/src/Mod/AddonManager/ALLOWED_PYTHON_PACKAGES.txt
+++ b/src/Mod/AddonManager/ALLOWED_PYTHON_PACKAGES.txt
@@ -21,6 +21,7 @@ openpyxl
 pandas
 pillow
 ply
+py-slvs
 pycollada
 pygit2
 pynastran