diff --git a/Cargo.toml b/Cargo.toml
index 1946b316..7163c757 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,7 @@ tiff = "0.11"
 image-webp = "0.2"
 moxcms = { version = "0.9", default-features = false, features = ["lut"] }
 jxl-oxide = { version = "0.12", default-features = false }
-jixel = "0.3.4" # BSD-3-Clause OR Apache-2.0, pure-Rust JPEG XL encoder (export; port of libjxl-tiny)
+jixel = "=0.3.4" # BSD-3-Clause OR Apache-2.0, pure-Rust JPEG XL encoder (export; port of libjxl-tiny)
 zune-jpegxl = { version = "0.5", default-features = false, features = ["std"] } # MIT/Apache-2.0/Zlib lossless JXL encoder (test fixtures only)
 ravif = { version = "0.13", default-features = false, features = ["threading"] } # no "asm": it needs nasm (non-Rust)
 # HDR AVIF (PQ): ravif fixes the sRGB transfer curve, so HDR files drive its rav1e + avif-serialize directly