diff --git a/examples/openai-htr/Dockerfile b/examples/openai-htr/Dockerfile
index 6b0ee50..ffb1eab 100644
--- a/examples/openai-htr/Dockerfile
+++ b/examples/openai-htr/Dockerfile
@@ -8,12 +8,12 @@ SHELL ["/bin/ash", "-o", "pipefail", "-c"]
 # hadolint ignore=DL3018
 RUN --mount=type=bind,from=imagemagick,source=/packages,target=/packages \
     --mount=type=bind,from=imagemagick,source=/etc/apk/keys,target=/etc/apk/keys \
-    apk add --no-cache /packages/imagemagick-*.apk
+    apk add --no-cache /packages/imagemagick-*.apk jq==1.7.1-r0
 
 RUN magick -list format | grep "JPEG-2000"
 
 ENV OPENAI_MODEL=gpt-4o-mini \
-    PROMPT="Transcribe this image that contains handwritten text. Include all text you see in the image. In your response, say absolutely nothing except the text from the image" \
+    PROMPT="Transcribe this image that contains handwritten text. Include all text you see in the image. In your response, say absolutely nothing except the text from the image." \
     MAX_TOKENS=300
 
 COPY scyllaridae.yml /app/scyllaridae.yml
diff --git a/examples/openai-htr/cmd.sh b/examples/openai-htr/cmd.sh
index b2a1dde..676fc13 100755
--- a/examples/openai-htr/cmd.sh
+++ b/examples/openai-htr/cmd.sh
@@ -9,27 +9,33 @@ magick - "$TMP_DIR/img.jpg"
 
 BASE64_IMAGE=$(base64 -w 0 "$TMP_DIR/img.jpg")
 
-curl https://api.openai.com/v1/chat/completions \
+cat <<EOF > "$TMP_DIR/payload.json"
+{
+  "model": "$OPENAI_MODEL",
+  "messages": [
+    {
+      "role": "user",
+      "content": [
+        {
+          "type": "text",
+          "text": "$PROMPT"
+        },
+        {
+          "type": "image_url",
+          "image_url": {
+            "url": "data:image/jpeg;base64,$BASE64_IMAGE"
+          }
+        }
+      ]
+    }
+  ],
+  "max_tokens": $MAX_TOKENS
+}
+EOF
+
+curl -s https://api.openai.com/v1/chat/completions \
   -H "Content-Type: application/json" \
   -H "Authorization: Bearer $OPENAI_API_KEY" \
-  -d '{
-    "model": "'"$OPENAI_MODEL"'",
-    "messages": [
-      {
-        "role": "user",
-        "content": [
-          {
-            "type": "text",
-            "text": "'"$PROMPT"'"
-          },
-          {
-            "type": "image_url",
-            "image_url": {
-              "url": "data:image/jpeg;base64,'"$BASE64_IMAGE"'"
-            }
-          }
-        ]
-      }
-    ],
-    "max_tokens": '"$MAX_TOKENS"'
-  }' | jq -r .choices[0].message.content
+  -d "@$TMP_DIR/payload.json" | jq -r .choices[0].message.content
+
+rm -rf "$TMP_DIR"