diff --git a/Project.toml b/Project.toml
index c00114789..77e347035 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Symbolics"
 uuid = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 authors = ["Shashi Gowda <gowda@mit.edu>"]
-version = "6.20.0"
+version = "6.21.0"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"
@@ -87,7 +87,7 @@ Reexport = "1"
 RuntimeGeneratedFunctions = "0.5.9"
 SciMLBase = "2"
 Setfield = "1"
-SpecialFunctions = "2"
+SpecialFunctions = "1.8, 2"
 StaticArraysCore = "1.4"
 SymPy = "2.2"
 SymbolicIndexingInterface = "0.3.14"