diff --git a/Project.toml b/Project.toml
index 6e6b72cdbb..a49d66979e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -55,7 +55,7 @@ ClimaDiagnostics = "0.2"
 ClimaParams = "0.10.4"
 ClimaTimeSteppers = "0.7.32"
 ClimaUtilities = "0.1.3"
-CloudMicrophysics = "0.18, 0.19, 0.20"
+CloudMicrophysics = "0.18, 0.19, 0.20, 0.21"
 Colors = "0.12"
 Dates = "1"
 Dierckx = "0.5"