diff --git a/Project.toml b/Project.toml
index 1142866..0f900a5 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,7 +15,7 @@ CodecZlib = "^0.7"
 HDF5 = "^0.17"
 Languages = "^0.4"
 TranscodingStreams = "^0.10"
-julia = "1.10"
+julia = "1.9"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"