diff --git a/CShocker/CShocker.csproj b/CShocker/CShocker.csproj
index dc50416..97dca06 100644
--- a/CShocker/CShocker.csproj
+++ b/CShocker/CShocker.csproj
@@ -7,7 +7,7 @@
         <Authors>Glax</Authors>
         <RepositoryUrl>https://github.com/C9Glax/CShocker</RepositoryUrl>
         <RepositoryType>git</RepositoryType>
-        <Version>2.0.1</Version>
+        <Version>2.0.2</Version>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/CShocker/Ranges/DurationRange.cs b/CShocker/Ranges/DurationRange.cs
index 59481c6..42a5e5b 100644
--- a/CShocker/Ranges/DurationRange.cs
+++ b/CShocker/Ranges/DurationRange.cs
@@ -11,4 +11,9 @@ public class DurationRange : RandomIntegerRange
     {
         return obj is IntensityRange && base.Equals(obj);
     }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine("DR", base.GetHashCode());
+    }
 }
\ No newline at end of file
diff --git a/CShocker/Ranges/IntensityRange.cs b/CShocker/Ranges/IntensityRange.cs
index 9b57e5e..11c36d1 100644
--- a/CShocker/Ranges/IntensityRange.cs
+++ b/CShocker/Ranges/IntensityRange.cs
@@ -11,4 +11,9 @@ public class IntensityRange : RandomIntegerRange
     {
         return obj is IntensityRange && base.Equals(obj);
     }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine("IR", base.GetHashCode());
+    }
 }
\ No newline at end of file
diff --git a/CShocker/Ranges/RandomIntegerRange.cs b/CShocker/Ranges/RandomIntegerRange.cs
index eb618b3..78e2a82 100644
--- a/CShocker/Ranges/RandomIntegerRange.cs
+++ b/CShocker/Ranges/RandomIntegerRange.cs
@@ -2,7 +2,7 @@
 
 public abstract class RandomIntegerRange
 {
-    public short Min, Max;
+    public readonly short Min, Max;
     internal RandomIntegerRange(short min, short max, short minLimit, short maxLimit)
     {
         if (max - min < 0)
@@ -27,8 +27,16 @@ public abstract class RandomIntegerRange
 
     public override bool Equals(object? obj)
     {
-        return obj is RandomIntegerRange rir &&
-               this.Min == rir.Min &&
-               this.Max == rir.Max;
+        return obj is RandomIntegerRange rir && Equals(rir);
+    }
+
+    private bool Equals(RandomIntegerRange other)
+    {
+        return Min == other.Min && Max == other.Max;
+    }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine(Min, Max);
     }
 }
\ No newline at end of file