diff --git a/Gemfile b/Gemfile
index a61523e51..679bcccf1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -54,7 +54,7 @@ gem "jbuilder", "~> 2.11" # Create JSON structures via a Builder-style DSL
 gem "js-routes", "~> 2.2" # Brings Rails named routes to javascript
 gem "jsonapi-serializer", "~> 2.2" # Serializer for Ruby objects
 gem "kaminari", "~> 1.2" # A Scope & Engine based, clean, powerful, customizable and sophisticated paginator
-gem "katex", "~> 0.8.0" # This rubygem enables you to render TeX math to HTML using KaTeX. It uses ExecJS under the hood
+gem "katex", "~> 0.9.0" # This rubygem enables you to render TeX math to HTML using KaTeX. It uses ExecJS under the hood
 gem "liquid", "~> 5.3" # A secure, non-evaling end user template engine with aesthetic markup
 gem "metainspector", "~> 5.12" # To get and parse website metadata for Open Graph rich objects
 gem "nokogiri", "~> 1.13" # HTML, XML, SAX, and Reader parser
diff --git a/Gemfile.lock b/Gemfile.lock
index ddab6e956..696e8ad70 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
       tzinfo
     eventmachine (1.2.7)
     excon (0.92.2)
-    execjs (2.7.0)
+    execjs (2.8.1)
     exifr (1.3.9)
     factory_bot (6.2.0)
       activesupport (>= 5.0.0)
@@ -451,7 +451,7 @@ GEM
       activerecord
       kaminari-core (= 1.2.2)
     kaminari-core (1.2.2)
-    katex (0.8.0)
+    katex (0.9.0)
       execjs (~> 2.7)
     knapsack_pro (3.2.1)
       rake
@@ -1016,7 +1016,7 @@ DEPENDENCIES
   js-routes (~> 2.2)
   jsonapi-serializer (~> 2.2)
   kaminari (~> 1.2)
-  katex (~> 0.8.0)
+  katex (~> 0.9.0)
   knapsack_pro (~> 3.2.1)
   launchy (~> 2.5)
   liquid (~> 5.3)
diff --git a/spec/liquid_tags/katex_tag_spec.rb b/spec/liquid_tags/katex_tag_spec.rb
index 4bc6d1e74..82ef6cd75 100644
--- a/spec/liquid_tags/katex_tag_spec.rb
+++ b/spec/liquid_tags/katex_tag_spec.rb
@@ -28,7 +28,7 @@ RSpec.describe KatexTag, type: :liquid_tag do
     end
 
     it "generates Katex errors" do
-      content = "\\c = \\pm\\sqrt{a^2 + b^2}"
+      content = "c = \\pm\\sqrt{a{^2 + b^2}"
       rendered = generate_katex_liquid(content).render
       expect(rendered).to include("ParseError: KaTeX parse error: ")
     end
diff --git a/vendor/cache/execjs-2.7.0.gem b/vendor/cache/execjs-2.7.0.gem
deleted file mode 100644
index 1247cce45..000000000
Binary files a/vendor/cache/execjs-2.7.0.gem and /dev/null differ
diff --git a/vendor/cache/execjs-2.8.1.gem b/vendor/cache/execjs-2.8.1.gem
new file mode 100644
index 000000000..b8c2d2fc4
Binary files /dev/null and b/vendor/cache/execjs-2.8.1.gem differ
diff --git a/vendor/cache/katex-0.8.0.gem b/vendor/cache/katex-0.8.0.gem
deleted file mode 100644
index 059da094f..000000000
Binary files a/vendor/cache/katex-0.8.0.gem and /dev/null differ
diff --git a/vendor/cache/katex-0.9.0.gem b/vendor/cache/katex-0.9.0.gem
new file mode 100644
index 000000000..e88b6223b
Binary files /dev/null and b/vendor/cache/katex-0.9.0.gem differ