diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index db70f23..800df06 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.4'
+          - '1.5'
           - '1'
         os:
           - ubuntu-latest
diff --git a/Project.toml b/Project.toml
index 114af5f..1ab5e89 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,7 +14,7 @@ RationalRoots = "0.1 - 1"
 HalfIntegers = "1"
 Primes = "0.4 - 1"
 LRUCache = "1.3"
-julia = "1.4"
+julia = "1.5"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"