diff --git a/.gitmodules b/.gitmodules
index 4d3d22bd37e0..971eb25a9466 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -247,3 +247,6 @@
 [submodule "community-build/community-projects/scalacheck-forward-compat"]
 	path = community-build/community-projects/scalacheck-forward-compat
 	url = https://github.com/dotty-staging/scalacheck
+[submodule "community-build/community-projects/http4s"]
+	path = community-build/community-projects/http4s
+	url = https://github.com/dotty-staging/http4s.git
diff --git a/community-build/community-projects/http4s b/community-build/community-projects/http4s
new file mode 160000
index 000000000000..fc0a18dd0a80
--- /dev/null
+++ b/community-build/community-projects/http4s
@@ -0,0 +1 @@
+Subproject commit fc0a18dd0a8091f0b2cdc87b58953e76efa47426
diff --git a/community-build/src/scala/dotty/communitybuild/projects.scala b/community-build/src/scala/dotty/communitybuild/projects.scala
index c2e505bc4960..c5e7997d0b21 100644
--- a/community-build/src/scala/dotty/communitybuild/projects.scala
+++ b/community-build/src/scala/dotty/communitybuild/projects.scala
@@ -791,6 +791,14 @@ object projects:
     dependencies = () => List(cats, disciplineMunit)
   )
 
+  lazy val http4s = SbtCommunityProject(
+    project = "http4s",
+    sbtTestCommand = "tests/test; server/test; client/test; ember-core/test; ember-server/test; ember-client/test; circe/test",
+    sbtPublishCommand = "publishLocal",
+    scalacOptions = SbtCommunityProject.scalacOptions.filter(_ != "-Ysafe-init"),
+    dependencies = () => List(cats, catsEffect3, fs2, disciplineMunit, scalacheckEffect)
+  )
+
 end projects
 
 lazy val forwardCompatMapping = Map[CommunityProject, CommunityProject](
@@ -892,7 +900,9 @@ def allProjects = List(
   projects.jacksonModuleScala,
   projects.specs2,
   projects.coop,
-  projects.coopForwardCompat
+  projects.coopForwardCompat,
+  projects.spire,
+  projects.http4s
 )
 
 lazy val projectMap = allProjects.groupBy(_.project)
diff --git a/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala b/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
index 5e40306aefd6..5be7f936ab66 100644
--- a/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
+++ b/community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala
@@ -52,6 +52,7 @@ class CommunityBuildTestB:
   @Test def scodecBits = projects.scodecBits.run()
   @Test def simulacrumScalafixAnnotations = projects.simulacrumScalafixAnnotations.run()
   @Test def spire = projects.spire.run()
+  @Test def http4s = projects.http4s.run()
 end CommunityBuildTestB
 
 @Category(Array(classOf[TestCategory]))