diff --git a/Changelog.md b/Changelog.md
index 0670e13..d2179ce 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 # Changelog
 
+[0.3.1]
+
+- Fixed possible `KeyNotFoundException` in C# code due to invalid
+  dictionary access when an IC housing has an error
+
 [0.3.0]
 
 - Implemented a multi-pass optimizer
diff --git a/ModData/About/About.xml b/ModData/About/About.xml
index 9b34754..d3a0e4f 100644
--- a/ModData/About/About.xml
+++ b/ModData/About/About.xml
@@ -2,7 +2,7 @@
 <ModMetadata xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <Name>Slang</Name>
   <Author>JoeDiertay</Author>
-  <Version>0.3.0</Version>
+  <Version>0.3.1</Version>
   <Description>
 [h1]Slang: High-Level Programming for Stationeers[/h1]
 
diff --git a/csharp_mod/GlobalCode.cs b/csharp_mod/GlobalCode.cs
index bd9c5b2..88286df 100644
--- a/csharp_mod/GlobalCode.cs
+++ b/csharp_mod/GlobalCode.cs
@@ -56,6 +56,11 @@ public static class GlobalCode
             return false;
         }
 
+        if (!sourceMaps[reference].ContainsKey(icErrorLine))
+        {
+            return false;
+        }
+
         var foundRange = sourceMaps[reference][icErrorLine];
 
         if (foundRange is null)
diff --git a/csharp_mod/Plugin.cs b/csharp_mod/Plugin.cs
index b5f2570..36123c5 100644
--- a/csharp_mod/Plugin.cs
+++ b/csharp_mod/Plugin.cs
@@ -41,7 +41,7 @@ namespace Slang
     {
         public const string PluginGuid = "com.biddydev.slang";
         public const string PluginName = "Slang";
-        public const string PluginVersion = "0.3.0";
+        public const string PluginVersion = "0.3.1";
 
         public static Mod MOD = new Mod(PluginName, PluginVersion);
 
diff --git a/csharp_mod/stationeersSlang.csproj b/csharp_mod/stationeersSlang.csproj
index 7be1826..57a61e0 100644
--- a/csharp_mod/stationeersSlang.csproj
+++ b/csharp_mod/stationeersSlang.csproj
@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <AssemblyName>StationeersSlang</AssemblyName>
     <Description>Slang Compiler Bridge</Description>
-    <Version>0.3.0</Version>
+    <Version>0.3.1</Version>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
diff --git a/rust_compiler/Cargo.toml b/rust_compiler/Cargo.toml
index 047478e..5b2305a 100644
--- a/rust_compiler/Cargo.toml
+++ b/rust_compiler/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "slang"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2021"
 
 [workspace]