diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 47711bce..14cfd7f7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,8 +22,7 @@ jobs:
           # - windows-latest
           # - macOS-latest
         nim:
-          - '1.6.0'
-          - '1.6.x'
+          - '2.0.0'
           - 'stable'
     steps:
       - uses: actions/checkout@v3
diff --git a/docs/migrating_3_to_4.md b/docs/migrating_3_to_4.md
index c7a3dd24..a4cbd92a 100644
--- a/docs/migrating_3_to_4.md
+++ b/docs/migrating_3_to_4.md
@@ -4,3 +4,4 @@
 
 - `ListBoxRow` widgets are no longer handled by the `ListBox.add` adder.
   Instead they can be added to a `ListBox` using the `addRow` adder.
+- Nim 1.x.x is no longer supported, use at least Nim 2.0.0.