diff --git a/packages/strapi-utils/lib/models.js b/packages/strapi-utils/lib/models.js
old mode 100755
new mode 100644
index 4f416be13a..7af0be329f
--- a/packages/strapi-utils/lib/models.js
+++ b/packages/strapi-utils/lib/models.js
@@ -457,11 +457,25 @@ module.exports = {
     _.forEach(params, (value, key)  => {
       let result;
       let formattedValue;
-
-      // Check if the value if a valid candidate to be converted to a number value
-      formattedValue = isNumeric(value)
-        ? _.toNumber(value)
-        : value;
+      let modelAttributes = models[model]['attributes'];
+      let fieldType;
+      // Get the field type to later check if it's a string before number conversion
+      if (modelAttributes[key]) {
+        fieldType = modelAttributes[key]['type'];
+      } else {
+        let splitKey = key.split('_').pop();
+        if (modelAttributes[splitKey]) {
+          fieldType = modelAttributes[splitKey]['type'];
+        }
+      }
+      // Check if the value is a valid candidate to be converted to a number value
+      if (fieldType != 'string') {
+        formattedValue = isNumeric(value)
+          ? _.toNumber(value)
+          : value;
+      } else {
+        formattedValue = value;
+      }
 
       if (_.includes(['_start', '_limit'], key)) {
         result = convertor(formattedValue, key);