diff --git a/docker/smith-constraints.txt b/docker/smith-constraints.txt
index f8dec919..8c6f7215 100644
--- a/docker/smith-constraints.txt
+++ b/docker/smith-constraints.txt
@@ -13,7 +13,8 @@ fontParts @ git+https://github.com/robotools/fontParts
 fonttools @ git+https://github.com/fonttools/fonttools
 gftools @ git+https://github.com/googlefonts/gftools
 glyphConstruction @ git+https://github.com/typemytype/glyphConstruction
-glyphsLib @ git+https://github.com/googlefonts/GlyphsLib
+#glyphsLib @ git+https://github.com/googlefonts/GlyphsLib
+glyphsLib==6.9.4
 langtag @ git+https://github.com/silnrsi/langtags
 MutatorMath @ git+https://github.com/LettError/MutatorMath
 odfpy @ git+https://github.com/eea/odfpy