diff --git a/Cargo.lock b/Cargo.lock
index 8139bf6..ad5e4e5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1912,7 +1912,7 @@ dependencies = [
  "docx-rs",
  "hayro",
  "pdf-extract",
- "png 0.17.16",
+ "png 0.18.1",
  "ppt-rs",
  "quick-xml 0.41.0",
  "serde_json",
diff --git a/Cargo.toml b/Cargo.toml
index 636d177..3c12ed7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -68,7 +68,7 @@ hayro = { version = "0.5", optional = true }
 
 [dev-dependencies]
 # Decode raster fixtures to assert scanned-page pixels survive rendering.
-png = "0.17"
+png = "0.18"
 # `.docx` output is a zip container; the tests re-open the produced bytes and
 # assert on the OOXML parts inside.
 zip = { version = "8", default-features = false, features = ["deflate"] }