diff --git a/libs/remix-debug/src/storage/storageResolver.js b/libs/remix-debug/src/storage/storageResolver.js
index 0de8fbd161..8186e87368 100644
--- a/libs/remix-debug/src/storage/storageResolver.js
+++ b/libs/remix-debug/src/storage/storageResolver.js
@@ -39,17 +39,14 @@ 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) {
-    return new Promise((resolve, reject) => {
-      if (this.preimagesMappingByAddress[address]) {
-        return resolve(this.preimagesMappingByAddress[address])
-      }
-      this.storageRange(tx, stepIndex, address).then((storage) => {
-        const mappings = mappingPreimages.decodeMappingsKeys(this.web3, storage, corrections)
-        this.preimagesMappingByAddress[address] = mappings
-        resolve(mappings)
-      }).catch(reject)
-    })
+  async initialPreimagesMappings (tx, stepIndex, address, corrections) {
+    if (this.preimagesMappingByAddress[address]) {
+      return this.preimagesMappingByAddress[address]
+    }
+    const storage = await this.storageRange(tx, stepIndex, address)
+    const mappings = mappingPreimages.decodeMappingsKeys(this.web3, storage, corrections)
+    this.preimagesMappingByAddress[address] = mappings
+    return mappings
   }
 
   /**
@@ -61,12 +58,9 @@ class StorageResolver {
    * @param {String} - address - lookup address
    * @param {Function} - callback - {key, hashedKey, value} -
    */
-  storageSlot (slot, tx, stepIndex, address) {
-    return new Promise((resolve, reject) => {
-      this.storageRangeInternal(this, slot, tx, stepIndex, address).then((storage) => {
-        resolve(storage[slot] !== undefined ? storage[slot] : null)
-      }).catch(reject)
-    })
+  async storageSlot (slot, tx, stepIndex, address) {
+    const storage = await this.storageRangeInternal(this, slot, tx, stepIndex, address)
+    return (storage[slot] !== undefined ? storage[slot] : null)
   }
 
   /**
@@ -85,27 +79,21 @@ class StorageResolver {
    *   even if the next 1000 items are not in the cache.
    * - If @arg slot is not cached, the corresponding value will be resolved and the next 1000 slots.
    */
-  storageRangeInternal (self, slotKey, tx, stepIndex, address) {
-    return new Promise((resolve, reject) => {
-      var cached = this.fromCache(self, address)
-      if (cached && cached.storage[slotKey]) { // we have the current slot in the cache and maybe the next 1000...
-        return resolve(cached.storage)
-      }
-      this.storageRangeWeb3Call(tx, address, slotKey, self.maxSize).then((result) => {
-        const [storage, nextKey] = result
-        if (!storage[slotKey] && slotKey !== self.zeroSlot) { // we don't cache the zero slot (could lead to inconsistency)
-          storage[slotKey] = {
-            key: slotKey,
-            value: self.zeroSlot
-          }
-        }
-        self.toCache(self, address, storage)
-        if (slotKey === self.zeroSlot && !nextKey) { // only working if keys are sorted !!
-          self.storageByAddress[address].complete = true
-        }
-        return resolve(storage)
-      }).catch(reject)
-    })
+  async storageRangeInternal (self, slotKey, tx, stepIndex, address) {
+    var cached = this.fromCache(self, address)
+    if (cached && cached.storage[slotKey]) { // we have the current slot in the cache and maybe the next 1000...
+      return cached.storage
+    }
+    const result = await this.storageRangeWeb3Call(tx, address, slotKey, self.maxSize)
+    const [storage, nextKey] = result
+    if (!storage[slotKey] && slotKey !== self.zeroSlot) { // we don't cache the zero slot (could lead to inconsistency)
+      storage[slotKey] = {key: slotKey, value: self.zeroSlot}
+    }
+    self.toCache(self, address, storage)
+    if (slotKey === self.zeroSlot && !nextKey) { // only working if keys are sorted !!
+      self.storageByAddress[address].complete = true
+    }
+    return storage
   }
 
   /**