diff --git a/ca/ca.go b/ca/ca.go
index 741593d2..bddcab79 100644
--- a/ca/ca.go
+++ b/ca/ca.go
@@ -15,6 +15,7 @@ import (
 	"sync"
 
 	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/middleware"
 	"github.com/pkg/errors"
 	"github.com/smallstep/certificates/acme"
 	acmeAPI "github.com/smallstep/certificates/acme/api"
@@ -173,6 +174,10 @@ func (ca *CA) Init(cfg *config.Config) (*CA, error) {
 	insecureMux := chi.NewRouter()
 	insecureHandler := http.Handler(insecureMux)
 
+	// Add HEAD middleware
+	mux.Use(middleware.GetHead)
+	insecureMux.Use(middleware.GetHead)
+
 	// Add regular CA api endpoints in / and /1.0
 	api.Route(mux)
 	mux.Route("/1.0", func(r chi.Router) {
diff --git a/go.mod b/go.mod
index 25020c27..fc5e7b2e 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	cloud.google.com/go v0.100.2
 	cloud.google.com/go/security v1.3.0
 	github.com/Masterminds/sprig/v3 v3.2.2
-	github.com/go-chi/chi v4.0.2+incompatible
+	github.com/go-chi/chi v4.1.2+incompatible
 	github.com/golang/mock v1.6.0
 	github.com/google/go-cmp v0.5.8
 	github.com/google/uuid v1.3.0
diff --git a/go.sum b/go.sum
index ce99276b..d993fdae 100644
--- a/go.sum
+++ b/go.sum
@@ -229,8 +229,8 @@ github.com/frankban/quicktest v1.13.0/go.mod h1:qLE0fzW0VuyUAJgPU19zByoIr0HtCHN/
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-asn1-ber/asn1-ber v1.3.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
-github.com/go-chi/chi v4.0.2+incompatible h1:maB6vn6FqCxrpz4FqWdh4+lwpyZIQS7YEAUcHlgXVRs=
-github.com/go-chi/chi v4.0.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
+github.com/go-chi/chi v4.1.2+incompatible h1:fGFk2Gmi/YKXk0OmGfBh0WgmN3XB8lVnEyNz34tQRec=
+github.com/go-chi/chi v4.1.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=