diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac749901..4691bbf1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.2.4] - 2022-04-13
+
+### Changed
+
+- Upgraded `Joern` with latest bug fixes in JVM bytecode frontend.
+
 ## [1.2.3] - 2022-04-05
 
 ### Changed
diff --git a/build.sbt b/build.sbt
index f720e4ab..8b4d617e 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@ name := "Plume"
 inThisBuild(
   List(
     organization := "com.github.plume-oss",
-    version := "1.2.3",
+    version := "1.2.4",
     scalaVersion := "2.13.8",
     crossScalaVersions := Seq("2.13.8", "3.1.1"),
     resolvers ++= Seq(
@@ -15,8 +15,7 @@ inThisBuild(
   )
 )
 
-val cpgVersion         = "1.3.527"
-val joernVersion       = "1.1.692"
+val joernVersion       = "1.1.726"
 val sootVersion        = "4.3.0"
 val tinkerGraphVersion = "3.4.11"
 val neo4jVersion       = "4.4.5"
@@ -43,7 +42,6 @@ Test / fork := true
 Test / parallelExecution := false
 
 libraryDependencies ++= Seq(
-  "io.shiftleft"                    %% "codepropertygraph"       % cpgVersion,
   "io.joern"                        %% "semanticcpg"             % joernVersion,
   "io.joern"                        %% "dataflowengineoss"       % joernVersion,
   "io.joern"                        %% "x2cpg"                   % joernVersion,
diff --git a/src/test/scala/com/github/plume/oss/querying/ConstructorInvocationTests.scala b/src/test/scala/com/github/plume/oss/querying/ConstructorInvocationTests.scala
index f8c625f8..54634a21 100644
--- a/src/test/scala/com/github/plume/oss/querying/ConstructorInvocationTests.scala
+++ b/src/test/scala/com/github/plume/oss/querying/ConstructorInvocationTests.scala
@@ -59,11 +59,10 @@ class ConstructorInvocationTests extends Jimple2CpgFixture {
         cons.signature shouldBe "void(int)"
         cons.code shouldBe "Foo(int x)"
         cons.parameter.size shouldBe 2
-        val objParam = cons.parameter.index(0).head
+        val List(objParam, otherParam) = cons.parameter.l
         objParam.name shouldBe "this"
         objParam.typeFullName shouldBe "Foo"
         objParam.dynamicTypeHintFullName shouldBe Seq("Foo")
-        val otherParam = cons.parameter.index(1).head
         otherParam.name shouldBe "x"
         otherParam.typeFullName shouldBe "int"
         otherParam.dynamicTypeHintFullName shouldBe Seq()
@@ -78,16 +77,18 @@ class ConstructorInvocationTests extends Jimple2CpgFixture {
         cons1.signature shouldBe "void(int)"
         cons1.code shouldBe "Bar(int x)"
         cons1.parameter.size shouldBe 2
-        cons1.parameter.index(0).head.name shouldBe "this"
-        cons1.parameter.index(1).head.name shouldBe "x"
+        val List(objParam1, otherParam) = cons1.parameter.l
+        objParam1.name shouldBe "this"
+        otherParam.name shouldBe "x"
 
         cons2.fullName shouldBe "Bar.<init>:void(int,int)"
         cons2.signature shouldBe "void(int,int)"
         cons2.code shouldBe "Bar(int x, int y)"
         cons2.parameter.size shouldBe 3
-        cons2.parameter.index(0).head.name shouldBe "this"
-        cons2.parameter.index(1).head.name shouldBe "x"
-        cons2.parameter.index(2).head.name shouldBe "y"
+        val List(objParam2, xParam, yParam) = cons2.parameter.l
+        objParam2.name shouldBe "this"
+        xParam.name shouldBe "x"
+        yParam.name shouldBe "y"
 
       case res =>
         fail(s"Expected 2 Bar constructors, but got $res")