diff --git a/pom.xml b/pom.xml
index 6c369586..3970acdd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
     <groupId>org.skyscreamer</groupId>
     <artifactId>jsonassert</artifactId>
-    <version>1.5.1-SNAPSHOT</version>
+    <version>1.5.0</version>
     <packaging>jar</packaging>
 
     <name>JSONassert</name>
@@ -57,9 +57,14 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.13.1</version>
+            <version>4.10</version>
             <scope>test</scope>
         </dependency>
+		<dependency>
+			<groupId>com.alibaba</groupId>
+			<artifactId>fastjson</artifactId>
+			<version>1.1.72.android</version>
+		</dependency>
     </dependencies>
 
     <build>
@@ -67,7 +72,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>2.3.1</version>
+                <version>3.8.1</version>
                 <configuration>
                     <source>1.6</source>
                     <target>1.6</target>
diff --git a/src/main/java/org/skyscreamer/jsonassert/JSONCompare.java b/src/main/java/org/skyscreamer/jsonassert/JSONCompare.java
index b963be9f..b6810bc8 100644
--- a/src/main/java/org/skyscreamer/jsonassert/JSONCompare.java
+++ b/src/main/java/org/skyscreamer/jsonassert/JSONCompare.java
@@ -10,10 +10,11 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
-*/
+ */
 
 package org.skyscreamer.jsonassert;
 
+import com.alibaba.fastjson.JSON;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -37,11 +38,12 @@ private static JSONComparator getComparatorForMode(JSONCompareMode mode) {
     /**
      * Compares JSON string provided to the expected JSON string using provided comparator, and returns the results of
      * the comparison.
+     *
      * @param expectedStr Expected JSON string
-     * @param actualStr JSON string to compare
-     * @param comparator Comparator to use
+     * @param actualStr   JSON string to compare
+     * @param comparator  Comparator to use
      * @return result of the comparison
-     * @throws JSONException JSON parsing error
+     * @throws JSONException            JSON parsing error
      * @throws IllegalArgumentException when type of expectedStr doesn't match the type of actualStr
      */
     public static JSONCompareResult compareJSON(String expectedStr, String actualStr, JSONComparator comparator)
@@ -50,26 +52,23 @@ public static JSONCompareResult compareJSON(String expectedStr, String actualStr
         Object actual = JSONParser.parseJSON(actualStr);
         if ((expected instanceof JSONObject) && (actual instanceof JSONObject)) {
             return compareJSON((JSONObject) expected, (JSONObject) actual, comparator);
-        }
-        else if ((expected instanceof JSONArray) && (actual instanceof JSONArray)) {
-            return compareJSON((JSONArray)expected, (JSONArray)actual, comparator);
-        }
-        else if (expected instanceof JSONString && actual instanceof JSONString) {
+        } else if ((expected instanceof JSONArray) && (actual instanceof JSONArray)) {
+            return compareJSON((JSONArray) expected, (JSONArray) actual, comparator);
+        } else if (expected instanceof JSONString && actual instanceof JSONString) {
             return compareJson((JSONString) expected, (JSONString) actual);
-        }
-        else if (expected instanceof JSONObject) {
+        } else if (expected instanceof JSONObject) {
             return new JSONCompareResult().fail("", expected, actual);
-        }
-        else {
+        } else {
             return new JSONCompareResult().fail("", expected, actual);
         }
     }
 
-  /**
+    /**
      * Compares JSON object provided to the expected JSON object using provided comparator, and returns the results of
      * the comparison.
-     * @param expected expected json object
-     * @param actual actual json object
+     *
+     * @param expected   expected json object
+     * @param actual     actual json object
      * @param comparator comparator to use
      * @return result of the comparison
      * @throws JSONException JSON parsing error
@@ -82,8 +81,9 @@ public static JSONCompareResult compareJSON(JSONObject expected, JSONObject actu
     /**
      * Compares JSON object provided to the expected JSON object using provided comparator, and returns the results of
      * the comparison.
-     * @param expected expected json array
-     * @param actual actual json array
+     *
+     * @param expected   expected json array
+     * @param actual     actual json array
      * @param comparator comparator to use
      * @return result of the comparison
      * @throws JSONException JSON parsing error
@@ -106,11 +106,12 @@ public static JSONCompareResult compareJson(final JSONString expected, final JSO
         final String expectedJson = expected.toJSONString();
         final String actualJson = actual.toJSONString();
         if (!expectedJson.equals(actualJson)) {
-          result.fail("");
+            result.fail("");
         }
         return result;
     }
 
+    //CS304 Issue link:https://github.com/skyscreamer/JSONassert/issues/103
     /**
      * Compares JSON string provided to the expected JSON string, and returns the results of the comparison.
      *
@@ -120,11 +121,17 @@ public static JSONCompareResult compareJson(final JSONString expected, final JSO
      * @return result of the comparison
      * @throws JSONException JSON parsing error
      */
-    public static JSONCompareResult compareJSON(String expectedStr, String actualStr, JSONCompareMode mode)
+    public static JSONCompareResult compareJSON(String expectedStr, String
+            actualStr, JSONCompareMode mode)
             throws JSONException {
-        return compareJSON(expectedStr, actualStr, getComparatorForMode(mode));
+        if ((mode == JSONCompareMode.STRICT) && (!isJSON(expectedStr) || !isJSON(actualStr))) {
+            return new JSONCompareResult().fail("", expectedStr, actualStr);
+        }
+        return compareJSON(expectedStr, actualStr,
+                getComparatorForMode(mode));
     }
 
+
     /**
      * Compares JSONObject provided to the expected JSONObject, and returns the results of the comparison.
      *
@@ -154,4 +161,22 @@ public static JSONCompareResult compareJSON(JSONArray expected, JSONArray actual
         return compareJSON(expected, actual, getComparatorForMode(mode));
     }
 
+    //CS304 Issue link:https://github.com/skyscreamer/JSONassert/issues/103
+
+    /**
+     * Judge if the given string can be converted into JSON object.
+     *
+     * @param str JSON string
+     * @return if the string can be convert into JSON Object
+     */
+    public static boolean isJSON(String str) {
+        boolean result = false;
+        try {
+            Object obj = JSON.parse(str);
+            result = true;
+        } catch (Exception e) {
+            result = false;
+        }
+        return result;
+    }
 }
diff --git a/src/main/java/org/skyscreamer/jsonassert/comparator/ArraySizeComparator.java b/src/main/java/org/skyscreamer/jsonassert/comparator/ArraySizeComparator.java
index 35a62981..27ee9c5e 100644
--- a/src/main/java/org/skyscreamer/jsonassert/comparator/ArraySizeComparator.java
+++ b/src/main/java/org/skyscreamer/jsonassert/comparator/ArraySizeComparator.java
@@ -53,7 +53,7 @@ public class ArraySizeComparator extends DefaultComparator {
 	 * Create new ArraySizeComparator.
 	 * 
 	 * @param mode
-	 *            comparison mode, has no impact on ArraySizeComparator but is
+	 *          FindBugs  comparison mode, has no impact on ArraySizeComparator but is
 	 *            used by instance of superclass DefaultComparator to control
 	 *            comparison of JSON items other than arrays.
 	 */
diff --git a/src/test/java/org/skyscreamer/jsonassert/comparator/CrashedJSONCompareTest.java b/src/test/java/org/skyscreamer/jsonassert/comparator/CrashedJSONCompareTest.java
new file mode 100644
index 00000000..224e251f
--- /dev/null
+++ b/src/test/java/org/skyscreamer/jsonassert/comparator/CrashedJSONCompareTest.java
@@ -0,0 +1,31 @@
+package org.skyscreamer.jsonassert.comparator;
+
+import org.json.JSONException;
+import org.junit.Test;
+import org.skyscreamer.jsonassert.JSONCompare;
+import org.skyscreamer.jsonassert.JSONCompareMode;
+import org.skyscreamer.jsonassert.JSONCompareResult;
+
+import static org.junit.Assert.assertTrue;
+import static org.skyscreamer.jsonassert.JSONCompare.compareJSON;
+
+//CS304 Issue link:https://github.com/skyscreamer/JSONassert/issues/103
+public class CrashedJSONCompareTest {
+    @Test
+    public void shouldJudgeValidJson() throws JSONException {
+        String validJson = "{\"id\":\"abc\"}";
+        String crashedJson1 = "{\"id\":'abc'}";
+        String crashedJson2 = "{\"id\":abc}";
+        assertTrue(JSONCompare.isJSON(validJson));
+        assertTrue(JSONCompare.isJSON(crashedJson1));
+        assertTrue(!JSONCompare.isJSON(crashedJson2));
+    }
+    @Test
+    public void shouldFailOnCrashedJson() throws JSONException{
+        String validJson = "{\"id\":\"abc\"}";
+        String crashedJson = "{\"id\":abc}";
+        JSONCompareResult jsonCompareResult = compareJSON(validJson,
+                crashedJson, JSONCompareMode.STRICT);
+        assertTrue(jsonCompareResult.failed());
+    }
+}