diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69c5773..d51875b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.5, 3.0.0-RC2]
+        scala: [2.13.5, 3.0.0-RC3]
         java: [openjdk@1.11.0]
     runs-on: ${{ matrix.os }}
     steps:
@@ -111,12 +111,12 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (3.0.0-RC2)
+      - name: Download target directories (3.0.0-RC3)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-3.0.0-RC2-${{ matrix.java }}
+          name: target-${{ matrix.os }}-3.0.0-RC3-${{ matrix.java }}
 
-      - name: Inflate target directories (3.0.0-RC2)
+      - name: Inflate target directories (3.0.0-RC3)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/build.sbt b/build.sbt
index 1b59184..5070db6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -9,7 +9,7 @@ inThisBuild(
     description := "String diff for Scala",
     crossScalaVersions := Seq(
       ScalaVersions.v213,
-      ScalaVersions.v3RC2
+      ScalaVersions.v3RC3
     ),
     Test / publishArtifact := false,
     Test / parallelExecution := false,
@@ -39,7 +39,7 @@ lazy val stringdiff =
     .settings(
       ScalaOptions.fixOptions,
       libraryDependencies ++= Seq(
-        "org.scalatest" %%% "scalatest" % "3.2.7" % Test
+        "org.scalatest" %%% "scalatest" % "3.2.8" % Test
       )
     )
 
diff --git a/project/ScalaVersions.scala b/project/ScalaVersions.scala
index 6bfed89..7c241b3 100644
--- a/project/ScalaVersions.scala
+++ b/project/ScalaVersions.scala
@@ -1,4 +1,4 @@
 object ScalaVersions {
   val v213  = "2.13.5"
-  val v3RC2 = "3.0.0-RC2"
+  val v3RC3 = "3.0.0-RC3"
 }
diff --git a/project/build.properties b/project/build.properties
index af4ff6f..f0be67b 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.0-RC2
+sbt.version=1.5.1