diff --git a/Project.toml b/Project.toml
index 997bce4..f9e0ea2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,6 +10,6 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-FLOWMath = "0.4"
+FLOWMath = "0.3.4"
 ImplicitAD = "0.3.1"
 julia = "1.6"