diff --git a/Project.toml b/Project.toml
index caf1f2b..435b78d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Krotov"
 uuid = "b05dcdc7-62f6-4360-bf2c-0898bba419de"
 authors = ["Michael Goerz <mail@michaelgoerz.net>"]
-version = "0.6.2+dev"
+version = "0.6.3"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
@@ -16,6 +16,6 @@ Dates = "1"
 LinearAlgebra = "1"
 Printf = "1"
 ConcreteStructs = "0.2"
-QuantumControlBase = ">=0.9.3"
+QuantumControlBase = "0.9.3"
 SparseArrays = "1"
 julia = "1.9"