diff --git a/action.yml b/action.yml
index 45ed8c2..dcd66a5 100644
--- a/action.yml
+++ b/action.yml
@@ -80,9 +80,9 @@ runs:
             --arg commit_oid "$COMMIT_OID" \
             --rawfile coverage_report __coverage_b64.txt \
             --arg language_name "$INPUT_LANGUAGE" \
-            --arg label "$INPUT_LABEL" \
+            --arg report_label "$INPUT_LABEL" \
             --argjson pr_number "$PR_NUMBER" \
-            '{commit_oid: $commit_oid, coverage_report: $coverage_report, language_name: $language_name, label: $label, pull_request_number: $pr_number}' \
+            '{"commit_oid": $commit_oid, "coverage_report": $coverage_report, "language_name": $language_name, "label": $report_label, "pull_request_number": $pr_number}' \
             > __body.json
         else
           # ref-based upload: provide ref, omit pull_request_number
@@ -91,8 +91,8 @@ runs:
             --arg ref "$REF" \
             --rawfile coverage_report __coverage_b64.txt \
             --arg language_name "$INPUT_LANGUAGE" \
-            --arg label "$INPUT_LABEL" \
-            '{commit_oid: $commit_oid, ref: $ref, coverage_report: $coverage_report, language_name: $language_name, label: $label}' \
+            --arg report_label "$INPUT_LABEL" \
+            '{"commit_oid": $commit_oid, "ref": $ref, "coverage_report": $coverage_report, "language_name": $language_name, "label": $report_label}' \
             > __body.json
         fi