diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 14c78bef..d45d303d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,7 +18,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'
           - '1'
         os:
           - ubuntu-latest
diff --git a/Project.toml b/Project.toml
index ddebecce..4b925e1f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -28,7 +28,7 @@ Random = "1"
 SimpleUnPack = "1.1"
 SparseArrays = "1"
 StatsAPI = "1.6"
-julia = "1.6"
+julia = "1.9"
 
 [extensions]
 HiddenMarkovModelsDistributionsExt = "Distributions"