diff --git a/pkgs/tools/misc/html-proofer/Gemfile.lock b/pkgs/tools/misc/html-proofer/Gemfile.lock
index 88e3eada9161..243bf66e70cd 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 (3.17.2)
+    html-proofer (3.17.3)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogumbo (~> 2.0)
@@ -18,7 +18,7 @@ GEM
     mini_portile2 (2.4.0)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
-    nokogumbo (2.0.3)
+    nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
     parallel (1.20.1)
     public_suffix (4.0.6)
diff --git a/pkgs/tools/misc/html-proofer/gemset.nix b/pkgs/tools/misc/html-proofer/gemset.nix
index c4974af034df..2aeb5bfd9c09 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 = "05h3liirjx6wvh97vdl59hmwzgji1ih61xq1w5nl87cmhpsxaqsf";
+      sha256 = "1i05vgyhyyps867zgpcd13wdidf0cpra39rhfff1jhkc1hn766lm";
       type = "gem";
     };
-    version = "3.17.2";
+    version = "3.17.3";
   };
   mercenary = {
     groups = ["default"];
@@ -79,10 +79,10 @@
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1nif9bn7zlizfcsk464b8n5gvspdim34hl7ldw2y7w4lcnwgg4zg";
+      sha256 = "0pxm7hx2lhmanm8kljd39f1j1742kl0a31zx98jsjiwrkfb5hhc6";
       type = "gem";
     };
-    version = "2.0.3";
+    version = "2.0.4";
   };
   parallel = {
     groups = ["default"];