diff --git a/Project.toml b/Project.toml
index 67cdb16f..c1f4b1f3 100644
--- a/Project.toml
+++ b/Project.toml
@@ -57,7 +57,7 @@ BenchmarkTools = "0.4, 0.5"
 CUDAnative = "2.5, 3.0"
 Cairo = "0.8, 1.0"
 CuArrays = "1.4, 2.0"
-DecFP = "0.4"
+DecFP = "0.4, 1.0"
 Decimals = "0.4"
 DiffEqBayes = "2.8"
 DiffEqBiological = "4.0"