diff --git a/SwanIntro/nbextension/yarn.lock b/SwanIntro/nbextension/yarn.lock
index e7626bf9..039da089 100644
--- a/SwanIntro/nbextension/yarn.lock
+++ b/SwanIntro/nbextension/yarn.lock
@@ -538,7 +538,7 @@ cyclist@~0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/cyclist/-/cyclist-0.2.2.tgz#1b33792e11e914a2fd6d6ed6447464444e5fa640"
 
-d@1:
+d@1, d@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/d/-/d-1.0.1.tgz#8698095372d58dbee346ffd0c7093f99f8f9eb5a"
   dependencies:
@@ -671,15 +671,16 @@ error-ex@^1.2.0:
   dependencies:
     is-arrayish "^0.2.1"
 
-es5-ext@^0.10.35, es5-ext@^0.10.46, es5-ext@^0.10.50, es5-ext@~0.10.14:
-  version "0.10.50"
-  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.50.tgz#6d0e23a0abdb27018e5ac4fd09b412bc5517a778"
+es5-ext@^0.10.35, es5-ext@^0.10.46, es5-ext@^0.10.50, es5-ext@^0.10.62, es5-ext@~0.10.14:
+  version "0.10.63"
+  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.63.tgz#9c222a63b6a332ac80b1e373b426af723b895bd6"
   dependencies:
-    es6-iterator "~2.0.3"
-    es6-symbol "~3.1.1"
-    next-tick "^1.0.0"
+    es6-iterator "^2.0.3"
+    es6-symbol "^3.1.3"
+    esniff "^2.0.1"
+    next-tick "^1.1.0"
 
-es6-iterator@^2.0.3, es6-iterator@~2.0.1, es6-iterator@~2.0.3:
+es6-iterator@^2.0.3, es6-iterator@~2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
   dependencies:
@@ -715,6 +716,13 @@ es6-symbol@3.1.1, es6-symbol@^3.1.1, es6-symbol@~3.1.1:
     d "1"
     es5-ext "~0.10.14"
 
+es6-symbol@^3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.3.tgz#bad5d3c1bcdac28269f4cb331e431c78ac705d18"
+  dependencies:
+    d "^1.0.1"
+    ext "^1.1.2"
+
 es6-templates@^0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/es6-templates/-/es6-templates-0.2.3.tgz#5cb9ac9fb1ded6eb1239342b81d792bbb4078ee4"
@@ -740,6 +748,15 @@ escope@^3.6.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
+esniff@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/esniff/-/esniff-2.0.1.tgz#a4d4b43a5c71c7ec51c51098c1d8a29081f9b308"
+  dependencies:
+    d "^1.0.1"
+    es5-ext "^0.10.62"
+    event-emitter "^0.3.5"
+    type "^2.7.2"
+
 esprima@~3.1.0:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
@@ -754,7 +771,7 @@ estraverse@^4.1.0, estraverse@^4.1.1:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
 
-event-emitter@~0.3.5:
+event-emitter@^0.3.5, event-emitter@~0.3.5:
   version "0.3.5"
   resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
   dependencies:
@@ -796,6 +813,12 @@ expand-brackets@^2.1.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.1"
 
+ext@^1.1.2:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/ext/-/ext-1.7.0.tgz#0ea4383c0103d60e70be99e9a7f11027a33c4f5f"
+  dependencies:
+    type "^2.7.2"
+
 extend-shallow@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-2.0.1.tgz#51af7d614ad9a9f610ea1bafbb989d6b1c56890f"
@@ -1462,9 +1485,9 @@ neo-async@^2.5.0:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
 
-next-tick@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
+next-tick@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.1.0.tgz#1836ee30ad56d67ef281b22bd199f709449b35eb"
 
 no-case@^2.2.0:
   version "2.3.2"
@@ -2221,6 +2244,10 @@ type@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/type/-/type-1.0.1.tgz#084c9a17fcc9151a2cdb1459905c2e45e4bb7d61"
 
+type@^2.7.2:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/type/-/type-2.7.2.tgz#2376a15a3a28b1efa0f5350dcf72d24df6ef98d0"
+
 typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"