diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1aeaa048..cb98fc10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
       - uses: actions/checkout@v2
 
@@ -30,7 +30,7 @@ jobs:
       - name: Install Poetry
         uses: Gr1N/setup-poetry@v4
         with:
-          poetry-version: 1.0.10
+          poetry-version: 1.1.5
 
       - name: Get poetry cache directory
         id: poetry-cache
@@ -66,7 +66,7 @@ jobs:
       - name: Install Poetry
         uses: Gr1N/setup-poetry@v4
         with:
-          poetry-version: 1.0.10
+          poetry-version: 1.1.5
 
       - name: Get poetry cache directory
         id: poetry-cache
@@ -103,7 +103,7 @@ jobs:
       - name: Install Poetry
         uses: Gr1N/setup-poetry@v4
         with:
-          poetry-version: 1.0.10
+          poetry-version: 1.1.5
 
       - name: Get poetry cache directory
         id: poetry-cache