diff --git a/yarn.lock b/yarn.lock
index f0a1f43..9a8a4c4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4084,11 +4084,9 @@ flush-write-stream@^1.0.0:
     readable-stream "^2.3.6"
 
 follow-redirects@^1.0.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.7.0.tgz#489ebc198dc0e7f64167bd23b03c4c19b5784c76"
-  integrity sha512-m/pZQy4Gj287eNy94nivy5wchN3Kp+Q5WgUPNy5lJSZ3sgkVKSYV/ZChMAQVIgx1SqfZ2zBZtPA2YlXIWxxJOQ==
-  dependencies:
-    debug "^3.2.6"
+  version "1.14.7"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.7.tgz#2004c02eb9436eee9a21446a6477debf17e81685"
+  integrity sha512-+hbxoLbFMbRKDwohX8GkTataGqO6Jb7jGwpAlwgy2bIz25XtRm7KEzJM76R1WiNT5SwZkX4Y75SwBolkpmE7iQ==
 
 for-in@^0.1.3:
   version "0.1.8"
@@ -5783,12 +5781,12 @@ jsx-ast-utils@^2.0.1, jsx-ast-utils@^2.1.0, jsx-ast-utils@^2.2.1:
     array-includes "^3.0.3"
     object.assign "^4.1.0"
 
-katex@^0.10.2:
-  version "0.10.2"
-  resolved "https://registry.yarnpkg.com/katex/-/katex-0.10.2.tgz#39973edbb65eda5b6f9e7f41648781e557dd4932"
-  integrity sha512-cQOmyIRoMloCoSIOZ1+gEwsksdJZ1EW4SWm3QzxSza/QsnZr6D4U1V9S4q+B/OLm2OQ8TCBecQ8MaIfnScI7cw==
+katex@0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/katex/-/katex-0.9.0.tgz#26a7d082c21d53725422d2d71da9b2d8455fbd4a"
+  integrity sha512-lp3x90LT1tDZBW2tjLheJ98wmRMRjUHwk4QpaswT9bhqoQZ+XA4cPcjcQBxgOQNwaOSt6ZeL/a6GKQ1of3LFxQ==
   dependencies:
-    commander "^2.19.0"
+    match-at "^0.1.1"
 
 killable@^1.0.0:
   version "1.0.1"
@@ -6045,6 +6043,11 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
+match-at@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/match-at/-/match-at-0.1.1.tgz#25d040d291777704d5e6556bbb79230ec2de0540"
+  integrity sha512-h4Yd392z9mST+dzc+yjuybOGFNOZjmXIPKWjxBd1Bb23r4SmDOsk2NYCU2BMUBGbSpZqwVsZYNq26QS3xfaT3Q==
+
 md5.js@^1.3.4:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.5.tgz#b5d07b8e3216e3e27cd728d72f70d1e6a342005f"