diff --git a/Project.toml b/Project.toml
index 0000e5d9b6..b5d9c352a4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -61,7 +61,7 @@ DiffEqBase = "6"
 DiffEqCallbacks = "2"
 DocStringExtensions = "0.8, 0.9"
 FastGaussQuadrature = "0.4, 0.5, 1"
-Insolation = "0.9.1"
+Insolation = "=0.9.1"
 Interpolations = "0.14, 0.15"
 IntervalSets = "0.5, 0.6, 0.7"
 Krylov = "0.9"
diff --git a/test/Project.toml b/test/Project.toml
index 5c86175887..05c4f7dbeb 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -75,7 +75,6 @@ ClimaCoreVTK = "0.7"
 Dierckx = "0.5"
 DiffEqNoiseProcess = "5"
 ForwardDiff = "0.10"
-Insolation = "0.9.1"
 Glob = "1"
 JSON = "0.21"
 NCRegressionTests = "0.2"