diff --git a/.github/workflows/_deploy_lambda.yml b/.github/workflows/_deploy_lambda.yml
index 9f2f89a4..35275341 100644
--- a/.github/workflows/_deploy_lambda.yml
+++ b/.github/workflows/_deploy_lambda.yml
@@ -85,8 +85,11 @@ jobs:
         run: |
           ENV_VARS=""
           if [ -n "${{ inputs.environment_vars }}" ]; then
-            # Convert multiline "KEY=VALUE" into HCL map format
-            ENV_VARS="{ $(echo "${{ inputs.environment_vars }}" | awk -F= '{gsub(/"/,"\\\""); printf "%s=\"%s\",",$1,$2}' | sed 's/,$//') }"
+            # Convert multiline KEY=VALUE into JSON
+            ENV_VARS=$(echo "${{ inputs.environment_vars }}" | \
+              jq -Rn '
+                [inputs | split("=")] |
+                { (.[0]): .[1] }' | jq -s add | jq -c .)
           fi
 
           PLAN_CMD="terraform plan \