diff --git a/WORKSPACE b/WORKSPACE
index c1489fde..4274aa1b 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -2,7 +2,7 @@ workspace(name = "martian")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-RULES_GO_VERSION = "v0.47.1"
+RULES_GO_VERSION = "v0.48.1"
 
 _RULES_GO_ARCHIVE = "github.com/bazelbuild/rules_go/releases/download/{}/rules_go-{}.zip".format(
     RULES_GO_VERSION,
@@ -11,14 +11,14 @@ _RULES_GO_ARCHIVE = "github.com/bazelbuild/rules_go/releases/download/{}/rules_g
 
 http_archive(
     name = "io_bazel_rules_go",
-    sha256 = "f74c98d6df55217a36859c74b460e774abc0410a47cc100d822be34d5f990f16",
+    sha256 = "b2038e2de2cace18f032249cb4bb0048abf583a36369fa98f687af1b3f880b26",
     urls = [
         "https://mirror.bazel.build/" + _RULES_GO_ARCHIVE,
         "https://" + _RULES_GO_ARCHIVE,
     ],
 )
 
-GAZELLE_VERSION = "v0.36.0"
+GAZELLE_VERSION = "v0.37.0"
 
 _GAZELLE_ARCHIVE = "github.com/bazelbuild/bazel-gazelle/releases/download/{}/bazel-gazelle-{}.tar.gz".format(
     GAZELLE_VERSION,
@@ -27,7 +27,7 @@ _GAZELLE_ARCHIVE = "github.com/bazelbuild/bazel-gazelle/releases/download/{}/baz
 
 http_archive(
     name = "bazel_gazelle",
-    integrity = "sha256-dd8ojEsxyB61D1Hi4U9HY8t1SNquEmgXJHBkY3/Z6mI=",
+    integrity = "sha256-12v3pg/YsFBEQJDfooN6Tq+YKeEWVhjuNdzspcvfWNU=",
     urls = [
         "https://storage.googleapis.com/bazel-mirror/" + _GAZELLE_ARCHIVE,
         "https://" + _GAZELLE_ARCHIVE,
diff --git a/deps.bzl b/deps.bzl
index 7768c3da..8dd55cc9 100644
--- a/deps.bzl
+++ b/deps.bzl
@@ -21,21 +21,21 @@ def martian_dependencies(
     maybe(
         http_archive,
         name = "bazel_skylib",
-        # 1.4.2, latest as of 2023-06-08
+        # 1.6.1, latest as of 2024-05-20
         urls = [
-            "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.4.2/bazel-skylib-1.4.2.tar.gz",
-            "https://github.com/bazelbuild/bazel-skylib/releases/download/1.4.2/bazel-skylib-1.4.2.tar.gz",
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
+            "https://github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
         ],
-        sha256 = "66ffd9315665bfaafc96b52278f57c7e2dd09f5ede279ea6d39b2be471e7e3aa",
+        sha256 = "9f38886a40548c6e96c106b752f242130ee11aaa068a56ba7e56f4511f33e4f2",
     )
 
     # Also do this before gazelle_dependencies.
     maybe(
         go_repository,
-        # v0.15.0, latest as of 2023-12-15
         name = "org_golang_x_sys",
-        version = "v0.19.0",
-        sum = "h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=",
+        # v0.20.0, latest as of 2024-05-20
+        version = "v0.20.0",
+        sum = "h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=",
         importpath = "golang.org/x/sys",
     )
 
@@ -67,10 +67,10 @@ def martian_dependencies(
         # is included here mostly for clarity.
         go_repository,
         name = "org_golang_x_tools",
-        # v0.15.0, latest as of 2023-11-16
-        version = "v0.20.0",
+        # v0.21.0, latest as of 2024-05-20
+        version = "v0.21.0",
         importpath = "golang.org/x/tools",
-        sum = "h1:hz/CVckiOxybQvFw6h7b/q80NTr9IUQb4s1IIzW7KNY=",
+        sum = "h1:qc0xYgIbsSDt9EyWz05J5wfa7LOVW0YTLOXrqdLAWIw=",
     )
 
     maybe(
diff --git a/go.mod b/go.mod
index 376ea1b0..bfbdc9be 100644
--- a/go.mod
+++ b/go.mod
@@ -4,8 +4,8 @@ require (
 	github.com/dustin/go-humanize v1.0.1
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/martian-lang/docopt.go v0.0.0-20180828184714-57cc8f5f669d
-	golang.org/x/sys v0.19.0
-	golang.org/x/tools v0.20.0
+	golang.org/x/sys v0.20.0
+	golang.org/x/tools v0.21.0
 )
 
-go 1.20
+go 1.21
diff --git a/go.sum b/go.sum
index e9826c7c..897ed855 100644
--- a/go.sum
+++ b/go.sum
@@ -4,7 +4,7 @@ github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaU
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
 github.com/martian-lang/docopt.go v0.0.0-20180828184714-57cc8f5f669d h1:H9E5hH90ZABvmY6cJLUCzNKs1OKIsQ1eo7tFxzJKoI0=
 github.com/martian-lang/docopt.go v0.0.0-20180828184714-57cc8f5f669d/go.mod h1:jEIK8Vz86rqUBOIHF8l3bfxnaXafOY3KY4vGBghfIwQ=
-golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/tools v0.20.0 h1:hz/CVckiOxybQvFw6h7b/q80NTr9IUQb4s1IIzW7KNY=
-golang.org/x/tools v0.20.0/go.mod h1:WvitBU7JJf6A4jOdg4S1tviW9bhUxkgeCui/0JHctQg=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/tools v0.21.0 h1:qc0xYgIbsSDt9EyWz05J5wfa7LOVW0YTLOXrqdLAWIw=
+golang.org/x/tools v0.21.0/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=