diff --git a/Project.toml b/Project.toml
index 4ebba3c..edf04ad 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,7 +11,7 @@ FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
 [compat]
 AbstractFFTs = "1"
 FFTW = "1"
-ForwardDiff = "0.10"
+ForwardDiff = "0.10, 1"
 julia = "1.6"
 
 [extras]