diff --git a/Cargo.lock b/Cargo.lock
index a3abf39c3..c51493f6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1345,7 +1345,7 @@ dependencies = [
 [[package]]
 name = "krilla"
 version = "0.3.0"
-source = "git+https://github.com/LaurenzV/krilla?rev=5a8af84#5a8af8490a5f908cb5b4cf552037c226f59f0823"
+source = "git+https://github.com/LaurenzV/krilla?rev=6136d31#6136d31338eebb1d0e3d213f9be7fa3ce68b877e"
 dependencies = [
  "base64",
  "bumpalo",
@@ -1372,7 +1372,7 @@ dependencies = [
 [[package]]
 name = "krilla-svg"
 version = "0.3.0"
-source = "git+https://github.com/LaurenzV/krilla?rev=5a8af84#5a8af8490a5f908cb5b4cf552037c226f59f0823"
+source = "git+https://github.com/LaurenzV/krilla?rev=6136d31#6136d31338eebb1d0e3d213f9be7fa3ce68b877e"
 dependencies = [
  "flate2",
  "fontdb",
diff --git a/Cargo.toml b/Cargo.toml
index 1054a44b4..89f6ed95e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -71,8 +71,8 @@ if_chain = "1"
 image = { version = "0.25.5", default-features = false, features = ["png", "jpeg", "gif"] }
 indexmap = { version = "2", features = ["serde"] }
 kamadak-exif = "0.6"
-krilla = { git = "https://github.com/LaurenzV/krilla", rev = "5a8af84", default-features = false, features = ["raster-images", "comemo", "rayon"] }
-krilla-svg = { git = "https://github.com/LaurenzV/krilla", rev = "5a8af84" }
+krilla = { git = "https://github.com/LaurenzV/krilla", rev = "6136d31", default-features = false, features = ["raster-images", "comemo", "rayon"] }
+krilla-svg = { git = "https://github.com/LaurenzV/krilla", rev = "6136d31" }
 kurbo = "0.11"
 libfuzzer-sys = "0.4"
 lipsum = "0.9"
diff --git a/crates/typst-pdf/src/convert.rs b/crates/typst-pdf/src/convert.rs
index 603c1d917..5a35c2519 100644
--- a/crates/typst-pdf/src/convert.rs
+++ b/crates/typst-pdf/src/convert.rs
@@ -539,6 +539,11 @@ fn finish(
                                 hint: "set the title of the document"
                             )
                         }
+                        ValidationError::MissingDocumentDate => {
+                            error!(Span::detached(), "{prefix} missing document date";
+                                hint: "set the date of the document"
+                            )
+                        }
                     }
                 })
                     .collect::<EcoVec<_>>();
@@ -549,6 +554,11 @@ fn finish(
                 let span = gc.image_to_spans.get(&i).unwrap();
                 bail!(*span, "failed to process image");
             }
+            KrillaError::SixteenBitImage(image, _) => {
+                let span = gc.image_to_spans.get(&image).unwrap();
+                bail!(*span, "16 bit images are not supported in this export mode";
+                    hint: "convert the image to 8 bit instead")
+            }
         },
     }
 }
diff --git a/crates/typst-pdf/src/image.rs b/crates/typst-pdf/src/image.rs
index f8ebbfa4b..084d9e800 100644
--- a/crates/typst-pdf/src/image.rs
+++ b/crates/typst-pdf/src/image.rs
@@ -29,6 +29,10 @@ pub(crate) fn handle_image(
 
     let interpolate = image.scaling() == Smart::Custom(ImageScaling::Smooth);
 
+    if let Some(alt) = image.alt() {
+        surface.start_alt_text(alt);
+    }
+
     match image.kind() {
         ImageKind::Raster(raster) => {
             let (exif_transform, new_size) = exif_transform(raster, size);
@@ -56,6 +60,10 @@ pub(crate) fn handle_image(
         }
     }
 
+    if image.alt().is_some() {
+        surface.end_alt_text();
+    }
+
     surface.pop();
     surface.reset_location();
 
diff --git a/crates/typst-pdf/src/metadata.rs b/crates/typst-pdf/src/metadata.rs
index 004d3263f..43199e6db 100644
--- a/crates/typst-pdf/src/metadata.rs
+++ b/crates/typst-pdf/src/metadata.rs
@@ -53,7 +53,7 @@ pub(crate) fn build_metadata(gc: &GlobalContext) -> Metadata {
     };
 
     if let Some(date) = date.and_then(|d| convert_date(d, tz)) {
-        metadata = metadata.modification_date(date).creation_date(date);
+        metadata = metadata.creation_date(date);
     }
 
     metadata = metadata.text_direction(dir);