diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3a02c1b..84dd14f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        hg: [ '5.0', '5.1', '5.2', '5.3', '5.4', '5.5', '5.6' ]
+        hg: [ '5.0', '5.1', '5.2', '5.3', '5.4', '5.5', '5.6', '5.7' ]
     env:
       HG_VERSION: ${{ matrix.hg }}
     steps:
diff --git a/tools/versions.txt b/tools/versions.txt
index 7f85138..839bbab 100644
--- a/tools/versions.txt
+++ b/tools/versions.txt
@@ -38,3 +38,5 @@ hg:5.3 hggit:0.9.0 dulwich:0.19.15 # 2020_01
 hg:5.4 hggit:0.9.0 dulwich:0.19.15 # 2020_04
 hg:5.5 hggit:0.9.0 dulwich:0.19.15 # 2020_08
 hg:5.6 hggit:0.9.0 dulwich:0.19.15 # 2020_10
+
+hg:5.7 hggit:0.10.0 dulwich:0.19.16 # 2021_01