diff --git a/pkgs/tools/misc/html-proofer/Gemfile.lock b/pkgs/tools/misc/html-proofer/Gemfile.lock
index 46c6ffb9242..be01c0118b3 100644
--- a/pkgs/tools/misc/html-proofer/Gemfile.lock
+++ b/pkgs/tools/misc/html-proofer/Gemfile.lock
@@ -6,13 +6,12 @@ GEM
     ethon (0.12.0)
       ffi (>= 1.3.0)
     ffi (1.11.1)
-    html-proofer (3.12.0)
+    html-proofer (3.12.2)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogiri (~> 1.10)
       parallel (~> 1.3)
       rainbow (~> 3.0)
-      timerizer (~> 0.3)
       typhoeus (~> 1.3)
       yell (~> 2.0)
     mercenary (0.3.6)
@@ -22,7 +21,6 @@ GEM
     parallel (1.17.0)
     public_suffix (4.0.1)
     rainbow (3.0.0)
-    timerizer (0.3.2)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
     yell (2.2.0)
diff --git a/pkgs/tools/misc/html-proofer/gemset.nix b/pkgs/tools/misc/html-proofer/gemset.nix
index 46c6734c025..2deda655d99 100644
--- a/pkgs/tools/misc/html-proofer/gemset.nix
+++ b/pkgs/tools/misc/html-proofer/gemset.nix
@@ -32,15 +32,15 @@
     version = "1.11.1";
   };
   html-proofer = {
-    dependencies = ["addressable" "mercenary" "nokogiri" "parallel" "rainbow" "timerizer" "typhoeus" "yell"];
+    dependencies = ["addressable" "mercenary" "nokogiri" "parallel" "rainbow" "typhoeus" "yell"];
     groups = ["default"];
     platforms = [];
     source = {
       remotes = ["https://rubygems.org"];
-      sha256 = "1a5h5ijrngfd4ri36g7bs5lcg4001i5xx7nlk35rsg34xpy8mp04";
+      sha256 = "0xkcchgvlqkk3xgn11vw8n42bhavj6nn6vqsbycbx1rqxgiljlhy";
       type = "gem";
     };
-    version = "3.12.0";
+    version = "3.12.2";
   };
   mercenary = {
     groups = ["default"];
@@ -103,16 +103,6 @@
     };
     version = "3.0.0";
   };
-  timerizer = {
-    groups = ["default"];
-    platforms = [];
-    source = {
-      remotes = ["https://rubygems.org"];
-      sha256 = "06zk04kprgj0abws15wqrk4q29f3wcx7z2jj3v25nnb2517lk66c";
-      type = "gem";
-    };
-    version = "0.3.2";
-  };
   typhoeus = {
     dependencies = ["ethon"];
     groups = ["default"];