diff --git a/.github/workflows/release-rust.yml b/.github/workflows/release-rust.yml
index 7780002..e6a9438 100644
--- a/.github/workflows/release-rust.yml
+++ b/.github/workflows/release-rust.yml
@@ -49,7 +49,7 @@ jobs:
 
           crate_version_exists() {
             local crate="$1"
-            curl -fsSL "https://crates.io/api/v1/crates/${crate}/versions" \
+            curl -fsSL -H "User-Agent: dkdc-bookmarks-release" "https://crates.io/api/v1/crates/${crate}/versions" \
               | jq -e --arg version "$version" '.versions[] | select(.num == $version and (.yanked | not))' >/dev/null
           }
 
diff --git a/bin/release-crates-io b/bin/release-crates-io
index 6f14b0c..ff753df 100755
--- a/bin/release-crates-io
+++ b/bin/release-crates-io
@@ -6,7 +6,7 @@ version="$(cargo metadata --no-deps --format-version 1 | jq -r '.packages[] | se
 
 crate_version_exists() {
   local crate="$1"
-  curl -fsSL "https://crates.io/api/v1/crates/${crate}/versions" \
+  curl -fsSL -H "User-Agent: dkdc-bookmarks-release" "https://crates.io/api/v1/crates/${crate}/versions" \
     | jq -e --arg version "$version" '.versions[] | select(.num == $version and (.yanked | not))' >/dev/null
 }