diff --git a/pom.xml b/pom.xml
index 7ce6ae4e..81bd9904 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,12 +47,6 @@
                 <artifactId>graphql-java</artifactId>
                 <version>${graphql-java.version}</version>
             </dependency>
-            <dependency>
-                <groupId>org.antlr</groupId>
-                <artifactId>antlr4-runtime</artifactId>
-                <version>4.11.1</version>
-                <scope>compile</scope>
-            </dependency>
             <dependency>
                 <groupId>com.fasterxml.jackson</groupId>
                 <artifactId>jackson-bom</artifactId>
@@ -162,10 +156,6 @@
             <groupId>com.graphql-java</groupId>
             <artifactId>graphql-java</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.antlr</groupId>
-            <artifactId>antlr4-runtime</artifactId>
-        </dependency>
         <dependency>
             <groupId>com.fasterxml</groupId>
             <artifactId>classmate</artifactId>
diff --git a/src/main/kotlin/graphql/kickstart/tools/SchemaParserBuilder.kt b/src/main/kotlin/graphql/kickstart/tools/SchemaParserBuilder.kt
index df8f7c4a..448228c2 100644
--- a/src/main/kotlin/graphql/kickstart/tools/SchemaParserBuilder.kt
+++ b/src/main/kotlin/graphql/kickstart/tools/SchemaParserBuilder.kt
@@ -11,8 +11,6 @@ import graphql.parser.ParserOptions
 import graphql.schema.GraphQLScalarType
 import graphql.schema.idl.RuntimeWiring
 import graphql.schema.idl.SchemaDirectiveWiring
-import org.antlr.v4.runtime.RecognitionException
-import org.antlr.v4.runtime.misc.ParseCancellationException
 import java.text.NumberFormat
 import kotlin.Int.Companion.MAX_VALUE
 import kotlin.reflect.KClass
@@ -178,22 +176,13 @@ class SchemaParserBuilder {
     }
 
     private fun parseDocuments(): List<Document> {
-        try {
-            val documents = files.map { parseDocument(listOf(Source(readFile(it), it))) }.toMutableList()
-
-            if (schemaStrings.any { it.text.isNotBlank() }) {
-                documents.add(parseDocument(schemaStrings))
-            }
-
-            return documents
-        } catch (pce: ParseCancellationException) {
-            val cause = pce.cause
-            if (cause != null && cause is RecognitionException) {
-                throw InvalidSchemaError(pce, cause)
-            } else {
-                throw pce
-            }
+        val documents = files.map { parseDocument(listOf(Source(readFile(it), it))) }.toMutableList()
+
+        if (schemaStrings.any { it.text.isNotBlank() }) {
+            documents.add(parseDocument(schemaStrings))
         }
+
+        return documents
     }
 
     private fun parseDocument(sources: List<Source>): Document {
@@ -243,13 +232,5 @@ class SchemaParserBuilder {
     }
 }
 
-class InvalidSchemaError(
-    pce: ParseCancellationException,
-    private val recognitionException: RecognitionException
-) : RuntimeException(pce) {
-    override val message: String
-        get() = "Invalid schema provided (${recognitionException.javaClass.name}) at: ${recognitionException.offendingToken}"
-}
-
 internal class SchemaSyntaxException(message: String, location: SourceLocation, e: InvalidSyntaxException) :
     InvalidSyntaxException(message, location, e.offendingToken, e.sourcePreview, e)
diff --git a/src/main/kotlin/module-info.java b/src/main/kotlin/module-info.java
index 90ef1592..55f7ef21 100644
--- a/src/main/kotlin/module-info.java
+++ b/src/main/kotlin/module-info.java
@@ -14,7 +14,6 @@
     requires com.fasterxml.jackson.datatype.jdk8;
     requires com.fasterxml.classmate;
 
-    requires org.antlr.antlr4.runtime;
     requires org.apache.commons.lang3;
     requires org.reactivestreams;
     requires org.slf4j;