diff --git a/bin/coursier b/bin/coursier
index a664bdf8..36395a79 100755
Binary files a/bin/coursier and b/bin/coursier differ
diff --git a/build.sbt b/build.sbt
index 238a2ccc..a9660c08 100644
--- a/build.sbt
+++ b/build.sbt
@@ -8,7 +8,7 @@ import scala.util.control.NoStackTrace
 
 lazy val V =
   new {
-    val protobuf = "3.15.6"
+    val protobuf = "3.21.4"
     val coursier = "2.0.8"
     val bloop = "1.4.7"
     val bsp = "2.0.0-M13"
@@ -37,6 +37,7 @@ inThisBuild(
     organization := "com.sourcegraph",
     homepage := Some(url("https://github.com/sourcegraph/scip-java")),
     dynverSeparator := "-",
+    PB.protocVersion := V.protobuf,
     licenses :=
       List("Apache-2.0" -> url("http://www.apache.org/licenses/LICENSE-2.0")),
     developers :=
@@ -239,14 +240,7 @@ lazy val cli = project
         // Pre-download Java 8, 11 and 17.
         run("coursier", "java-home", "--jvm", "8")
         run("coursier", "java-home", "--jvm", "11")
-        run(
-          "coursier",
-          "java-home",
-          "--jvm",
-          "temurin:17",
-          "--jvm-index",
-          "https://github.com/coursier/jvm-index/blob/master/index.json"
-        )
+        run("coursier", "java-home", "--jvm", "17")
 
         // Install `scip-java` binary.
         add(script, "/usr/local/bin/scip-java")
@@ -332,9 +326,7 @@ lazy val minimized17 = project
   .in(file("tests/minimized/.j17"))
   .settings(
     minimizedSettings,
-    javaToolchainJvmIndex :=
-      Some("https://github.com/coursier/jvm-index/blob/master/index.json"),
-    javaToolchainVersion := "temurin:17",
+    javaToolchainVersion := "17",
     javacOptions ++= javacModuleOptions
   )
   .dependsOn(agent, plugin)
diff --git a/project/JavaToolchainPlugin.scala b/project/JavaToolchainPlugin.scala
index 30254cd1..5aef42db 100644
--- a/project/JavaToolchainPlugin.scala
+++ b/project/JavaToolchainPlugin.scala
@@ -67,7 +67,7 @@ object JavaToolchainPlugin extends AutoPlugin {
     // The tools.jar file includes the bytecode for the Java compiler in the com.sun.source package.
     // The Java compiler is available by default in Java 9+, so we only need to add tools.jar to the
     // bootclasspath for Java 8.
-    if (home.toString.contains("1.8") && toolsJar.isFile) {
+    if (version == "8" && toolsJar.isFile) {
       List(s"-Xbootclasspath/p:$toolsJar")
     } else {
       List()
@@ -92,10 +92,31 @@ object JavaToolchainPlugin extends AutoPlugin {
           .toList
           .flatMap(index => "--jvm-index" :: index :: Nil)
         val arguments =
-          List("java", "-jar", coursier.toString, "java-home", "--jvm", v) ++
-            index
+          List(
+            "java",
+            "-jar",
+            coursier.toString,
+            "java-home",
+            "--jvm",
+            v,
+            "--architecture",
+            jvmArchitecture(v)
+          ) ++ index
         new File(Process(arguments).!!.trim)
       }
     )
   }
+
+  private def jvmArchitecture(jvmVersion: String): String =
+    if (scala.util.Properties.isMac && sys.props("os.arch") == "aarch64")
+      "amd64"
+    else
+      defaultCoursierJVMArchitecture
+  def defaultCoursierJVMArchitecture: String =
+    sys.props("os.arch") match {
+      case "x86_64" =>
+        "amd64"
+      case x =>
+        x
+    }
 }
diff --git a/scip-java/src/main/resources/scip-java/coursier b/scip-java/src/main/resources/scip-java/coursier
old mode 100644
new mode 100755
index a664bdf8..36395a79
Binary files a/scip-java/src/main/resources/scip-java/coursier and b/scip-java/src/main/resources/scip-java/coursier differ
diff --git a/scip-java/src/main/scala/com/sourcegraph/scip_java/buildtools/ScipBuildTool.scala b/scip-java/src/main/scala/com/sourcegraph/scip_java/buildtools/ScipBuildTool.scala
index 44e0518f..7358ef8e 100644
--- a/scip-java/src/main/scala/com/sourcegraph/scip_java/buildtools/ScipBuildTool.scala
+++ b/scip-java/src/main/scala/com/sourcegraph/scip_java/buildtools/ScipBuildTool.scala
@@ -503,8 +503,8 @@ class ScipBuildTool(index: IndexCommand) extends BuildTool("SCIP", index) {
           "java-home",
           "--jvm",
           config.jvm,
-          "--jvm-index",
-          "https://github.com/coursier/jvm-index/blob/master/index.json"
+          "--architecture",
+          jvmArchitecture
         )
         .call()
         .out
@@ -532,6 +532,19 @@ class ScipBuildTool(index: IndexCommand) extends BuildTool("SCIP", index) {
       Failure(SubprocessException(result))
   }
 
+  private def jvmArchitecture: String =
+    if (scala.util.Properties.isMac && sys.props("os.arch") == "aarch64")
+      "amd64"
+    else
+      defaultCoursierJVMArchitecture
+  def defaultCoursierJVMArchitecture: String =
+    sys.props("os.arch") match {
+      case "x86_64" =>
+        "amd64"
+      case x =>
+        x
+    }
+
   private def clean(): Unit = {
     Files.walkFileTree(targetroot, new DeleteVisitor)
   }