diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0a01a76..c4f2d86 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.7.3'
           - '1.9'
           - '1.10'
         os:
diff --git a/Project.toml b/Project.toml
index 638a9c4..6b34534 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,5 +21,5 @@ Artifacts = "<0.0.1, 1"
 Dates = "<0.0.1, 1"
 DelimitedFiles = "<0.0.1, 1"
 Interpolations = "0.13, 0.14, 0.15"
-julia = "1.7"
+julia = "1.9"
 ClimaParams = "0.10"