diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c1e06957..63e1b5b7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,19 +7,27 @@ on:
     branches: [ main ]
 
 jobs:
-  build:
-    name: Build and Test
+  test:
     strategy:
+      fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        scala: [2.13.11, 2.12.18]
-        java: [zulu@1.8, zulu@1.11, zulu@1.17]
+        include:
+          - os: ubuntu-latest
+            java: 11
+          - os: ubuntu-latest
+            java: 17
+          - os: ubuntu-latest
+            java: 21
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3.0.2
-      - name: Set up Java
-        uses: olafurpg/setup-scala@v13
-        with:
-          java-version: ${{ matrix.java }}
-      - name: Run tests
-        run: sbt ++${{ matrix.scala }} test
\ No newline at end of file
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Setup JDK
+      uses: actions/setup-java@v3
+      with:
+        distribution: temurin
+        java-version: ${{ matrix.java }}
+        cache: sbt
+    - name: Build and test
+      shell: bash
+      run: sbt -v +test
\ No newline at end of file
diff --git a/avrohugger-core/src/main/scala/input/parsers/FileInputParser.scala b/avrohugger-core/src/main/scala/input/parsers/FileInputParser.scala
index f52e9fbe..53986c66 100644
--- a/avrohugger-core/src/main/scala/input/parsers/FileInputParser.scala
+++ b/avrohugger-core/src/main/scala/input/parsers/FileInputParser.scala
@@ -7,10 +7,10 @@ import stores.ClassStore
 import org.apache.avro.{Protocol, Schema}
 import org.apache.avro.Schema.Parser
 import org.apache.avro.Schema.Type.{ENUM, FIXED, RECORD, UNION}
-import org.apache.avro.compiler.idl.Idl
-import org.apache.avro.generic.{GenericDatumReader, GenericRecord}
 import org.apache.avro.file.DataFileReader
-import org.apache.avro.SchemaParseException
+import org.apache.avro.generic.{GenericDatumReader, GenericRecord}
+import org.apache.avro.idl.IdlReader
+import org.apache.avro.{AvroTypeException, SchemaParseException}
 
 import java.io.File
 import scala.jdk.CollectionConverters._
@@ -48,19 +48,24 @@ class FileInputParser {
         sys.error(s"Can't redefine:  ${nonEqualElements.mkString(",")} in $infile")
       } else {
         if (commonElements.isEmpty) {
-          val _ = parser.addTypes(tempParser.getTypes)
+          val _ = parser.addTypes(tempParser.getTypes.values)
         } else {
           val missingTypes = tempParser.getTypes().keySet().asScala.diff(parser.getTypes().keySet().asScala)
           val _ = parser.addTypes(missingTypes.map { t =>
             t -> tempParser.getTypes().get(t)
-          }.toMap.asJava)
+          }.toMap.asJava.values)
         }
       }
     }
     
     def mightBeRecoverable(e: SchemaParseException): Boolean = {
       val msg = e.getMessage
-      msg.contains("Undefined name:") || msg.contains("is not a defined name") 
+      msg.contains("Undefined name:") || msg.contains("is not a defined name")
+    }
+
+    def mightBeRecoverableType(e: AvroTypeException): Boolean = {
+      val msg = e.getMessage
+      msg.contains("Undefined schema:")
     }
 
     def tryParse(inFile: File, parser: Schema.Parser): List[Schema] = {
@@ -68,8 +73,11 @@ class FileInputParser {
       val parsed = Try(tempParser.parse(inFile)).map(schema => {
         copySchemas(tempParser, parser)
         schema
-      }).recoverWith { case e: SchemaParseException if mightBeRecoverable(e) => 
-        Try(parser.parse(inFile))
+      }).recoverWith {
+        case e: AvroTypeException if mightBeRecoverableType(e) => 
+          Try(parser.parse(inFile))
+        case e: SchemaParseException if mightBeRecoverable(e) => 
+          Try(parser.parse(inFile))
       }
       unUnion(parsed.get)// throw the avro parse exception if Failure
     }
@@ -89,8 +97,8 @@ class FileInputParser {
           val protocol = Protocol.parse(infile)
           List(Right(protocol))
         case "avdl" =>
-          val idlParser = new Idl(infile, classLoader)
-          val protocol = idlParser.CompilationUnit()
+          val idl = new IdlReader().parse(infile.toPath())
+          val protocol = idl.getProtocol()
           /**
            * IDLs may refer to types imported from another file. When converted 
            * to protocols, the imported types that share the IDL's namespace 
diff --git a/avrohugger-core/src/main/scala/input/parsers/StringInputParser.scala b/avrohugger-core/src/main/scala/input/parsers/StringInputParser.scala
index 55e48be0..26f75ff1 100644
--- a/avrohugger-core/src/main/scala/input/parsers/StringInputParser.scala
+++ b/avrohugger-core/src/main/scala/input/parsers/StringInputParser.scala
@@ -8,7 +8,7 @@ import org.apache.avro.Protocol
 import org.apache.avro.Schema
 import org.apache.avro.Schema.Parser
 import org.apache.avro.SchemaParseException
-import org.apache.avro.compiler.idl.Idl
+import org.apache.avro.idl.IdlReader
 import org.apache.avro.compiler.idl.ParseException
 
 import scala.jdk.CollectionConverters._
@@ -22,7 +22,8 @@ class StringInputParser {
 
   def getSchemaOrProtocols(
     inputString: String,
-    schemaStore: SchemaStore): List[Either[Schema, Protocol]] = {
+    schemaStore: SchemaStore
+  ): List[Either[Schema, Protocol]] = {
 
     def trySchema(str: String): List[Either[Schema, Protocol]] = {
       try {
@@ -48,13 +49,13 @@ class StringInputParser {
       try {
         val bytes = str.getBytes(Charset.forName("UTF-8"))
         val inStream = new java.io.ByteArrayInputStream(bytes)
-        val idlParser = new Idl(inStream)
-        val protocol = idlParser.CompilationUnit()
+        val idlParser = new IdlReader().parse(inStream)
+        val protocol = idlParser.getProtocol()
         List(Right(protocol))
       }
       catch {
         case e: ParseException => sys.error(s"Unable to parse: ${e}")
-        case npe: NullPointerException => sys.error("Imports not supported in String IDLs, only avdl files.")
+        case e: SchemaParseException => sys.error("Imports not supported in String IDLs, only avdl files.")
         case unknown: Throwable => sys.error("Unexpected exception: " + unknown)
         }
       }
diff --git a/build.sbt b/build.sbt
index 3c989e22..0c30afbc 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,15 +1,16 @@
-lazy val avroVersion = "1.11.3"
+lazy val avroVersion = "1.12.0"
 
 lazy val commonSettings = Seq(
   organization := "com.julianpeeters",
-  version := "2.8.3",
+  version := "2.9.0-SNAPSHOT",
   ThisBuild / versionScheme := Some("semver-spec"),
   scalacOptions ++= Seq("-unchecked", "-deprecation", "-feature"),
   Test / scalacOptions ++= Seq("-Yrangepos"),
-  scalaVersion := "3.3.1",
-  crossScalaVersions := Seq("2.12.18", "2.13.12", scalaVersion.value),
+  scalaVersion := "3.3.3",
+  crossScalaVersions := Seq("2.12.19", "2.13.14", scalaVersion.value),
   libraryDependencies += "org.apache.avro" % "avro" % avroVersion,
   libraryDependencies += "org.apache.avro" % "avro-compiler" % avroVersion,
+  libraryDependencies += "org.apache.avro" % "avro-idl" % avroVersion,
   libraryDependencies := { CrossVersion.partialVersion(scalaVersion.value) match {
     case Some((2, scalaMinor)) if scalaMinor < 13 =>
       // for implementing SpecificRecord from standard case class definitions
@@ -20,7 +21,7 @@ lazy val commonSettings = Seq(
   }},
   libraryDependencies := { CrossVersion.partialVersion(scalaVersion.value) match {
     case Some((2, scalaMinor)) if scalaMinor < 13 =>
-      libraryDependencies.value ++ Seq("org.scala-lang.modules" %% "scala-collection-compat" % "2.11.0")
+      libraryDependencies.value ++ Seq("org.scala-lang.modules" %% "scala-collection-compat" % "2.12.0")
     case _ =>
       libraryDependencies.value
   }},
diff --git a/project/build.properties b/project/build.properties
index 8cf07b7c..cb409aac 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.9.8
\ No newline at end of file
+sbt.version=1.10.1
\ No newline at end of file