diff --git a/pkgs/tools/misc/html-proofer/Gemfile.lock b/pkgs/tools/misc/html-proofer/Gemfile.lock
index 9c42a2c0a9f..01b135dbf87 100644
--- a/pkgs/tools/misc/html-proofer/Gemfile.lock
+++ b/pkgs/tools/misc/html-proofer/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
     ethon (0.12.0)
       ffi (>= 1.3.0)
     ffi (1.13.1)
-    html-proofer (3.17.4)
+    html-proofer (3.18.0)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogumbo (~> 2.0)
diff --git a/pkgs/tools/misc/html-proofer/gemset.nix b/pkgs/tools/misc/html-proofer/gemset.nix
index d4c9a5367db..13f3aed7337 100644
--- a/pkgs/tools/misc/html-proofer/gemset.nix
+++ b/pkgs/tools/misc/html-proofer/gemset.nix
@@ -37,10 +37,10 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1wjwr7c19dr7rai44ypqghbakgav91h9swg88cddn7rxf7a6vl3b";
+      sha256 = "1icjr9hg8gk1dsy9gnhffkamh4d8yfkmqa4kfzdpbnvr50qvfmwz";
       type = "gem";
     };
-    version = "3.17.4";
+    version = "3.18.0";
   };
   mercenary = {
     groups = ["default"];