diff --git a/WotBlitzStatistics.GraphQl/Mutation/WotBlitzStatisticsMutation.cs b/WotBlitzStatistics.GraphQl/Mutation/WotBlitzStatisticsMutation.cs
new file mode 100644
index 0000000..c7f4206
--- /dev/null
+++ b/WotBlitzStatistics.GraphQl/Mutation/WotBlitzStatisticsMutation.cs
@@ -0,0 +1,31 @@
+using System;
+using System.Threading.Tasks;
+using WotBlitzStatistics.Logic;
+using WotBlitzStatisticsPro.Common.Model;
+
+namespace WotBlitzStatistics.GraphQl.Mutation
+{
+    /// <summary>
+    /// WotBlitzStatistics Mutations
+    /// </summary>
+    public class WotBlitzStatisticsMutation
+    {
+        private readonly IWargamingDictionaries _wargamingDictionaries;
+
+        public WotBlitzStatisticsMutation(IWargamingDictionaries wargamingDictionaries)
+        {
+            _wargamingDictionaries = wargamingDictionaries;
+        }
+
+        /// <summary>
+        /// Updates the necessary dictionaries in database.
+        /// </summary>
+        /// <param name="updateDictionariesRequest">Determines what dictionaries should be updated.</param>
+        /// <returns>Information about what was updated.</returns>
+        public Task<UpdateDictionariesResponseItem[]> UpdateDictionaries(
+            UpdateDictionariesRequest updateDictionariesRequest)
+        {
+            return _wargamingDictionaries.UpdateDictionaries(updateDictionariesRequest);
+        }
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatistics.GraphQl/Query/WotBlitzStatisticsQuery.cs b/WotBlitzStatistics.GraphQl/Query/WotBlitzStatisticsQuery.cs
index 44c1060..420c2c8 100644
--- a/WotBlitzStatistics.GraphQl/Query/WotBlitzStatisticsQuery.cs
+++ b/WotBlitzStatistics.GraphQl/Query/WotBlitzStatisticsQuery.cs
@@ -7,6 +7,9 @@ namespace WotBlitzStatistics.GraphQl.Query
 {
 	public class WotBlitzStatisticsQuery
 	{
+        // 571050560 - mboga Eu
+        // 90277267 - Mboga Ru
+
         private readonly IWargamingSearch _wargamingSearcher;
 
         public WotBlitzStatisticsQuery(IWargamingSearch wargamingSearcher)
diff --git a/WotBlitzStatistics.GraphQl/Startup.cs b/WotBlitzStatistics.GraphQl/Startup.cs
index eb5d480..c6a238c 100644
--- a/WotBlitzStatistics.GraphQl/Startup.cs
+++ b/WotBlitzStatistics.GraphQl/Startup.cs
@@ -6,6 +6,7 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using WotBlitzStatistics.GraphQl.Mutation;
 using WotBlitzStatistics.GraphQl.ObjectTypes;
 using WotBlitzStatistics.GraphQl.Query;
 using WotBlitzStatistics.Logic;
@@ -49,7 +50,7 @@ namespace WotBlitzStatistics.GraphQl
 				.AddAuthorizeDirectiveType()
 
 				.AddQueryType<WotBlitzStatisticsQuery>()
-				//.AddMutationType<MutationType>()
+                .AddMutationType<WotBlitzStatisticsMutation>()
 				//.AddSubscriptionType<SubscriptionType>()
 				.AddType<AccountsSearchItemObjectType>()
 				.AddType<AccountsSearchObjectType>()
diff --git a/WotBlitzStatistics.Logic/IWargamingDictionaries.cs b/WotBlitzStatistics.Logic/IWargamingDictionaries.cs
new file mode 100644
index 0000000..6e3a9cb
--- /dev/null
+++ b/WotBlitzStatistics.Logic/IWargamingDictionaries.cs
@@ -0,0 +1,11 @@
+using System.Threading.Tasks;
+using WotBlitzStatisticsPro.Common.Model;
+
+namespace WotBlitzStatistics.Logic
+{
+    public interface IWargamingDictionaries
+    {
+        Task<UpdateDictionariesResponseItem[]> UpdateDictionaries(
+            UpdateDictionariesRequest updateDictionariesRequest);
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatistics.Logic/WargamingDictionaries.cs b/WotBlitzStatistics.Logic/WargamingDictionaries.cs
new file mode 100644
index 0000000..e46c2d1
--- /dev/null
+++ b/WotBlitzStatistics.Logic/WargamingDictionaries.cs
@@ -0,0 +1,25 @@
+using System.Threading.Tasks;
+using WotBlitzStatisticsPro.Common.Model;
+
+namespace WotBlitzStatistics.Logic
+{
+    public class WargamingDictionaries: IWargamingDictionaries
+    {
+        public Task<UpdateDictionariesResponseItem[]> UpdateDictionaries(UpdateDictionariesRequest updateDictionariesRequest)
+        {
+            if ((updateDictionariesRequest.DictionaryTypes & DictionaryType.StaticDictionaries) != 0)
+            {
+                // Update static 
+            }
+            if ((updateDictionariesRequest.DictionaryTypes & DictionaryType.Achievements) != 0)
+            {
+                // Update achievements 
+            }
+            if ((updateDictionariesRequest.DictionaryTypes & DictionaryType.Vehicles) != 0)
+            {
+                // Update vehicles 
+            }
+            throw new System.NotImplementedException();
+        }
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatistics.Logic/WotBlitzStatisticsLogicInstaller.cs b/WotBlitzStatistics.Logic/WotBlitzStatisticsLogicInstaller.cs
index ea0f9e9..bd79401 100644
--- a/WotBlitzStatistics.Logic/WotBlitzStatisticsLogicInstaller.cs
+++ b/WotBlitzStatistics.Logic/WotBlitzStatisticsLogicInstaller.cs
@@ -11,6 +11,7 @@ namespace WotBlitzStatistics.Logic
             services.AddAutoMapper(typeof(WotBlitzStatisticsLogicInstaller));
             services.AddHttpClient<IWargamingApiClient, WargamingApiClient>();
             services.AddTransient<IWargamingSearch, WargamingSearch>();
+            services.AddTransient<IWargamingDictionaries, WargamingDictionaries>();
         }
     }
 }
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Common/Model/DictionaryType.cs b/WotBlitzStatisticsPro.Common/Model/DictionaryType.cs
new file mode 100644
index 0000000..4057087
--- /dev/null
+++ b/WotBlitzStatisticsPro.Common/Model/DictionaryType.cs
@@ -0,0 +1,32 @@
+using System;
+
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// List of dictionaries
+    /// </summary>
+    [Flags]
+    public enum DictionaryType
+    {
+        /// <summary>
+        /// Static dictionaries - Languages, VehicleNations, VehicleTypes, AchievementSections, ClanRoles
+        /// </summary>
+        StaticDictionaries = 1,
+        /// <summary>
+        /// Achievements
+        /// </summary>
+        Achievements = 2,
+        /// <summary>
+        /// Vehicles encyclopedia
+        /// </summary>
+        Vehicles = 4,
+        /// <summary>
+        /// Only vehicles and Achievements
+        /// </summary>
+        AchievementsAndVehicles = Achievements | Vehicles,
+        /// <summary>
+        /// All dictionaries
+        /// </summary>
+        All = StaticDictionaries | Achievements | Vehicles
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Common/Model/MarkOfMastery.cs b/WotBlitzStatisticsPro.Common/Model/MarkOfMastery.cs
index a329182..88f5392 100644
--- a/WotBlitzStatisticsPro.Common/Model/MarkOfMastery.cs
+++ b/WotBlitzStatisticsPro.Common/Model/MarkOfMastery.cs
@@ -1,11 +1,29 @@
 namespace WotBlitzStatisticsPro.Common.Model
 {
+	/// <summary>
+	/// Mastery
+	/// </summary>
 	public enum MarkOfMastery
 	{
+		/// <summary>
+		/// No mastery
+		/// </summary>
 		None = 0,
+		/// <summary>
+		/// Third mark of mastery
+		/// </summary>
 		Rank3 = 1,
+		/// <summary>
+		/// Second mark of mastery
+		/// </summary>
 		Rank2 = 2,
+		/// <summary>
+		/// First mark of mastery
+		/// </summary>
 		Rank1 = 3,
+		/// <summary>
+		/// Master mark
+		/// </summary>
 		Master = 4
 	}
 }
diff --git a/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesRequest.cs b/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesRequest.cs
new file mode 100644
index 0000000..a958892
--- /dev/null
+++ b/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesRequest.cs
@@ -0,0 +1,13 @@
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Request for update dictionaries mutation
+    /// </summary>
+    public class UpdateDictionariesRequest
+    {
+        /// <summary>
+        /// Determines what dictionaries should be updated. Usage: StaticDictionaries | Achievements | Vehicles
+        /// </summary>
+        public DictionaryType DictionaryTypes { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesResponseItem.cs b/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesResponseItem.cs
new file mode 100644
index 0000000..8c31278
--- /dev/null
+++ b/WotBlitzStatisticsPro.Common/Model/UpdateDictionariesResponseItem.cs
@@ -0,0 +1,18 @@
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Represents the response of the Update dictionaries mutation
+    /// </summary>
+    public class UpdateDictionariesResponseItem
+    {
+        /// <summary>
+        /// Type of updated dictionary
+        /// </summary>
+        public DictionaryType DictionaryType { get; set; }
+
+        /// <summary>
+        /// A bit summary about what have been updated
+        /// </summary>
+        public string Description { get; set; }
+    }
+}
\ No newline at end of file