diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
index 67f495da..e9da9017 100644
--- a/.github/workflows/backend-ci.yml
+++ b/.github/workflows/backend-ci.yml
@@ -40,17 +40,7 @@ jobs:
         echo "${{ secrets.STORAGE_JSON }}" > src/test/resources/engaged-shade-405207-b8ba9bb8a30f.json
         echo "${{ secrets.STORAGE_JSON }}" > src/main/resources/engaged-shade-405207-b8ba9bb8a30f.json
     
-    - name: Set File Permissions
-      run: |
-        chmod 644 src/test/resources/application-env.yml
-        chmod 644 src/main/resources/application-env.yml
-        chmod 644 src/test/resources/twtw_firebase_key.json
-        chmod 644 src/main/resources/twtw_firebase_key.json
-        chmod 644 src/test/resources/engaged-shade-405207-b8ba9bb8a30f.json
-        chmod 644 src/main/resources/engaged-shade-405207-b8ba9bb8a30f.json
-        chmod +x gradlew
-        find src
-      
+    - run: chmod +x gradlew
     - run: ./gradlew build
     - run: ./gradlew jib
 
diff --git a/backend/src/main/java/com/twtw/backend/config/web/WebConfig.java b/backend/src/main/java/com/twtw/backend/config/web/WebConfig.java
index 92fecc15..8540816b 100644
--- a/backend/src/main/java/com/twtw/backend/config/web/WebConfig.java
+++ b/backend/src/main/java/com/twtw/backend/config/web/WebConfig.java
@@ -1,12 +1,14 @@
 package com.twtw.backend.config.web;
 
+import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
-
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@@ -23,11 +25,14 @@ public void configureMessageConverters(final List<HttpMessageConverter<?>> conve
         super.configureMessageConverters(converters);
     }
 
-    private ObjectMapper objectMapper() {
+    @Bean
+    @Primary
+    public ObjectMapper objectMapper() {
         return new ObjectMapper()
                 .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
                 .configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true)
                 .configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, true)
+                .configure(JsonParser.Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true)
                 .setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE)
                 .registerModule(new JavaTimeModule());
     }