diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cf19378e..4a8da9ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.0.0-M3, 3.0.0-M2, 2.12.13, 2.13.4]
+        scala: [3.0.0-M3, 3.0.0-RC1, 2.12.13, 2.13.4]
         java: [adopt@1.8]
     runs-on: ${{ matrix.os }}
     steps:
@@ -112,12 +112,12 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (3.0.0-M2)
+      - name: Download target directories (3.0.0-RC1)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-3.0.0-M2-${{ matrix.java }}
+          name: target-${{ matrix.os }}-3.0.0-RC1-${{ matrix.java }}
 
-      - name: Inflate target directories (3.0.0-M2)
+      - name: Inflate target directories (3.0.0-RC1)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/build.sbt b/build.sbt
index ad885f5e..6cf73a32 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ ThisBuild / organizationName := "Typelevel"
 ThisBuild / publishGithubUser := "johnynek"
 ThisBuild / publishFullName := "P. Oscar Boykin"
 
-ThisBuild / crossScalaVersions := List("3.0.0-M3", "3.0.0-M2", "2.12.13", "2.13.4")
+ThisBuild / crossScalaVersions := List("3.0.0-M3", "3.0.0-RC1", "2.12.13", "2.13.4")
 
 ThisBuild / versionIntroduced := Map(
   "3.0.0-M2" -> "0.1.99",
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 38c83537..f4d3cef1 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -2,10 +2,9 @@ import sbt._
 import org.portablescala.sbtplatformdeps.PlatformDepsPlugin.autoImport._
 
 object Dependencies {
-  lazy val cats = Def.setting("org.typelevel" %%% "cats-core" % "2.4.1")
-  lazy val munit = Def.setting("org.scalameta" %%% "munit" % "0.7.21")
-  lazy val munitScalacheck = Def.setting("org.scalameta" %%% "munit-scalacheck" % "0.7.21")
-  lazy val scalaCheck = Def.setting("org.scalacheck" %%% "scalacheck" % "1.14.3")
+  lazy val cats = Def.setting("org.typelevel" %%% "cats-core" % "2.4.2")
+  lazy val munit = Def.setting("org.scalameta" %%% "munit" % "0.7.22")
+  lazy val munitScalacheck = Def.setting("org.scalameta" %%% "munit-scalacheck" % "0.7.22")
   lazy val fastParse = "com.lihaoyi" %% "fastparse" % "2.3.1"
   lazy val parsley = "org.http4s" %% "parsley" % "1.5.0-M3"
   lazy val jawnAst = "org.typelevel" %% "jawn-ast" % "1.0.3"