diff --git a/libs/remix-debug/src/storage/storageResolver.js b/libs/remix-debug/src/storage/storageResolver.js
index 1e5924c66a..9ee951f766 100644
--- a/libs/remix-debug/src/storage/storageResolver.js
+++ b/libs/remix-debug/src/storage/storageResolver.js
@@ -25,10 +25,8 @@ class StorageResolver {
    * @param {String} - address - lookup address
    * @param {Function} - callback - contains a map: [hashedKey] = {key, hashedKey, value}
    */
-  storageRange (tx, stepIndex, address, callback) {
-    this.storageRangeInternal(this, this.zeroSlot, tx, stepIndex, address).then((result) => {
-      callback(null, result)
-    }).catch(callback)
+  storageRange (tx, stepIndex, address) {
+    return this.storageRangeInternal(this, this.zeroSlot, tx, stepIndex, address)
   }
 
   /**
@@ -41,17 +39,16 @@ class StorageResolver {
    * @param {Array} corrections - used in case the calculated sha3 has been modifyed before SSTORE (notably used for struct in mapping).
    * @return {Function} - callback
    */
-  initialPreimagesMappings (tx, stepIndex, address, corrections, callback) {
-    if (this.preimagesMappingByAddress[address]) {
-      return callback(null, this.preimagesMappingByAddress[address])
-    }
-    this.storageRange(tx, stepIndex, address, (error, storage) => {
-      if (error) {
-        return callback(error)
+  initialPreimagesMappings (tx, stepIndex, address, corrections) {
+    return new Promise((resolve, reject) => {
+      if (this.preimagesMappingByAddress[address]) {
+        return resolve(this.preimagesMappingByAddress[address])
       }
-      const mappings = mappingPreimages.decodeMappingsKeys(this.web3, storage, corrections)
-      this.preimagesMappingByAddress[address] = mappings
-      callback(null, mappings)
+      this.storageRange(tx, stepIndex, address).then((storage) => {
+        const mappings = mappingPreimages.decodeMappingsKeys(this.web3, storage, corrections)
+        this.preimagesMappingByAddress[address] = mappings
+        resolve(mappings)
+      }).catch(reject)
     })
   }
 
diff --git a/libs/remix-debug/src/storage/storageViewer.js b/libs/remix-debug/src/storage/storageViewer.js
index d46b0cfc3b..59325f887f 100644
--- a/libs/remix-debug/src/storage/storageViewer.js
+++ b/libs/remix-debug/src/storage/storageViewer.js
@@ -31,13 +31,9 @@ class StorageViewer {
     * @param {Function} - callback - contains a map: [hashedKey] = {key, hashedKey, value}
     */
   storageRange (callback) {
-    this.storageResolver.storageRange(this.context.tx, this.context.stepIndex, this.context.address, (error, storage) => {
-      if (error) {
-        callback(error)
-      } else {
-        callback(null, Object.assign({}, storage, this.storageChanges))
-      }
-    })
+    this.storageResolver.storageRange(this.context.tx, this.context.stepIndex, this.context.address).then((storage) => {
+      callback(null, Object.assign({}, storage, this.storageChanges))
+    }).catch(callback)
   }
 
   /**
@@ -76,15 +72,7 @@ class StorageViewer {
     */
   async initialMappingsLocation (corrections) {
     if (!this.initialMappingsLocationPromise) {
-      this.initialMappingsLocationPromise = new Promise((resolve, reject) => {
-        this.storageResolver.initialPreimagesMappings(this.context.tx, this.context.stepIndex, this.context.address, corrections, (error, initialMappingsLocation) => {
-          if (error) {
-            reject(error)
-          } else {
-            resolve(initialMappingsLocation)
-          }
-        })
-      })
+      this.initialMappingsLocationPromise = this.storageResolver.initialPreimagesMappings(this.context.tx, this.context.stepIndex, this.context.address, corrections)
     }
     return this.initialMappingsLocationPromise
   }