diff --git a/bombe-asm/src/main/java/org/cadixdev/bombe/asm/jar/JarEntryRemappingTransformer.java b/bombe-asm/src/main/java/org/cadixdev/bombe/asm/jar/JarEntryRemappingTransformer.java
index fef70dc..2cbd9bc 100644
--- a/bombe-asm/src/main/java/org/cadixdev/bombe/asm/jar/JarEntryRemappingTransformer.java
+++ b/bombe-asm/src/main/java/org/cadixdev/bombe/asm/jar/JarEntryRemappingTransformer.java
@@ -43,6 +43,7 @@
 
 import java.util.List;
 import java.util.function.BiFunction;
+import java.util.jar.Attributes;
 import java.util.stream.Collectors;
 
 /**
@@ -84,14 +85,17 @@ public JarClassEntry transform(final JarClassEntry entry) {
 
     @Override
     public JarManifestEntry transform(final JarManifestEntry entry) {
-        // Remap the Main-Class attribute
-        final String mainClassObf = entry.getManifest().getMainAttributes().getValue("Main-Class")
-                .replace('.', '/');
-        final String mainClassDeobf = this.remapper.map(mainClassObf)
-                .replace('/', '.');
+        // Remap the Main-Class attribute, if present
+        if (entry.getManifest().getMainAttributes().containsKey(new Attributes.Name("Main-Class"))) {
+            final String mainClassObf = entry.getManifest().getMainAttributes().getValue("Main-Class")
+                    .replace('.', '/');
+            final String mainClassDeobf = this.remapper.map(mainClassObf)
+                    .replace('/', '.');
+
+            // Since Manifest is mutable, we need'nt create a new entry \o/
+            entry.getManifest().getMainAttributes().putValue("Main-Class", mainClassDeobf);
+        }
 
-        // Since Manifest is mutable, we need'nt create a new entry \o/
-        entry.getManifest().getMainAttributes().putValue("Main-Class", mainClassDeobf);
         return entry;
     }
 
diff --git a/bombe-asm/src/test/java/org/cadixdev/bombe/asm/test/JarEntryRemappingTransformerTests.java b/bombe-asm/src/test/java/org/cadixdev/bombe/asm/test/JarEntryRemappingTransformerTests.java
index d64105b..65bd26d 100644
--- a/bombe-asm/src/test/java/org/cadixdev/bombe/asm/test/JarEntryRemappingTransformerTests.java
+++ b/bombe-asm/src/test/java/org/cadixdev/bombe/asm/test/JarEntryRemappingTransformerTests.java
@@ -83,7 +83,7 @@ public void remapsClasses() {
     }
 
     @Test
-    public void remapsMainClass() throws IOException {
+    public void remapsMainClass() {
         final Manifest obfManifest = new Manifest();
         {
             obfManifest.getMainAttributes().putValue("Manifest-Version", "1.0");
@@ -95,6 +95,16 @@ public void remapsMainClass() throws IOException {
         assertEquals("pkg.Demo", deobfManifest.getMainAttributes().getValue("Main-Class"));
     }
 
+    @Test
+    public void remapsSimpleManifest() {
+        final Manifest obfManifest = new Manifest();
+        {
+            obfManifest.getMainAttributes().putValue("Manifest-Version", "1.0");
+        }
+
+        TRANSFORMER.transform(new JarManifestEntry(0, obfManifest));
+    }
+
     @Test
     public void remapsConfig() {
         final ServiceProviderConfiguration obfConfig = new ServiceProviderConfiguration(
diff --git a/build.gradle b/build.gradle
index 6db20c2..805956c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ subprojects {
 
     group = 'org.cadixdev'
     archivesBaseName = project.name.toLowerCase()
-    version = '0.3.1'
+    version = '0.3.2'
 
     repositories {
         mavenCentral()
diff --git a/changelogs/0.3.2.md b/changelogs/0.3.2.md
new file mode 100644
index 0000000..cbc1695
--- /dev/null
+++ b/changelogs/0.3.2.md
@@ -0,0 +1,9 @@
+Bombe 0.3.2
+===========
+
+Bombe 0.3.2 resolves a critical bug with `JarEntryRemappingTransformer` where it
+would crash given a manifest with no `Main-Class`.
+
+As Bombe 0.3.x is still in use by the latest version of Lorenz and Atlas, and
+used in software running today - this is why a further release to 0.3 is being
+made.