diff --git a/Cargo.toml b/Cargo.toml
index 7462181..17a163c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ chrono = "0.4.23" # `TimeZone::with_ymd_and_hms` needed
 num = "0.4"
 num_enum = "0.7"
 png = "0.17"
-proj = { version = "0.28", optional = true }
+proj = { version = "0.30", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 openjpeg-sys = "1.0.5" # avoiding 1.0.2/1.0.4