diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f5006e..12a81fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        nim: [stable, 1.6.18, 1.4.8, 1.2.18]
+        nim: [stable, 1.6.16, 1.4.8, 1.2.18]
     steps:
     - uses: actions/checkout@v2
     - uses: iffy/install-nim@v3
diff --git a/circomcompat.nimble b/circomcompat.nimble
index bebacec..143b5b3 100644
--- a/circomcompat.nimble
+++ b/circomcompat.nimble
@@ -9,6 +9,6 @@ srcDir        = "src"
 
 # Dependencies
 
-requires "nim >= 1.6.18"
+requires "nim >= 1.2.18"
 
 include "build.nims"
\ No newline at end of file