diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc87f30..4f5a337 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         version:
           - '1.0'
-          - '1.5'
+          - '1.6'
         os:
           - ubuntu-latest
           - macOS-latest
diff --git a/Project.toml b/Project.toml
index fbb8806..913c400 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,7 +12,7 @@ Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 
 [compat]
-ProximalAlgorithms = "<= 0.4.0"
+ProximalAlgorithms = "0.4.0"
 ProximalOperators = "0.14"
 julia = "1.0.0"