diff --git a/Project.toml b/Project.toml
index 0d7a961..70a05f0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,6 +20,7 @@ TranscodingStreams = "3bb67fe8-82b1-5028-8e26-92a6c54297fa"
 URIs = "5c2747f8-b7ea-4ff2-ba2e-563bfd36b1d4"
 
 [compat]
+Base64 = "1.11"
 CodecZstd = "0.8"
 DataFrames = "1.7"
 DatabentoBinaryEncoding = "0.1.6"