diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a03915f53..65d9c3f8c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,8 +15,8 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - "1.3"
-          - "1.6"
+          - "1.4"       # Old version: requires 1.4 for kwargs in readdir
+          - "1.6"       # Current LTS
           - "nightly"   # Latest Release
         os:
           - ubuntu-latest
diff --git a/Project.toml b/Project.toml
index f2c1c2f48..65842f4ad 100644
--- a/Project.toml
+++ b/Project.toml
@@ -28,7 +28,7 @@ IntegralArrays = "0.1"
 Netpbm = "1"
 ProgressMeter = "1"
 QuartzImageIO = "0.7"
-julia = "1"
+julia = "1.4"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"