diff --git a/.all-contributorsrc b/.all-contributorsrc
index fd8d142ef..7c59caa12 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -51,7 +51,7 @@
     {
       "login": "NaN",
       "name": "Maximilian Lam",
-      "avatar_url": "https://www.gravatar.com/avatar/7e6045f81f93a2c971ce7cb66cd4587a?d=identicon&s=100",
+      "avatar_url": "https://www.gravatar.com/avatar/c9a7c14c7ee2616e2e018176f777fbce?d=identicon&s=100",
       "profile": "https://github.com/harvard-edge/cs249r_book/graphs/contributors",
       "contributions": []
     },
@@ -135,7 +135,7 @@
     {
       "login": "NaN",
       "name": "Aghyad Deeb",
-      "avatar_url": "https://www.gravatar.com/avatar/89028203f82ed944d6264d55d9bd383b?d=identicon&s=100",
+      "avatar_url": "https://www.gravatar.com/avatar/f5ebab28a511b04321219bc2633441b6?d=identicon&s=100",
       "profile": "https://github.com/harvard-edge/cs249r_book/graphs/contributors",
       "contributions": []
     },
@@ -310,7 +310,7 @@
     {
       "login": "NaN",
       "name": "Annie Laurie Cook",
-      "avatar_url": "https://www.gravatar.com/avatar/cd08a25544d7c63e44e7029d84091ea5?d=identicon&s=100",
+      "avatar_url": "https://www.gravatar.com/avatar/ef9591a71474687cc39e0e64b2ba0421?d=identicon&s=100",
       "profile": "https://github.com/harvard-edge/cs249r_book/graphs/contributors",
       "contributions": []
     },
@@ -345,7 +345,7 @@
     {
       "login": "NaN",
       "name": "Costin-Andrei Oncescu",
-      "avatar_url": "https://www.gravatar.com/avatar/58536b3d9691440cb0d2c2a12115352b?d=identicon&s=100",
+      "avatar_url": "https://www.gravatar.com/avatar/b22df7bfabb7428d69fdc45b8601c348?d=identicon&s=100",
       "profile": "https://github.com/harvard-edge/cs249r_book/graphs/contributors",
       "contributions": []
     },
diff --git a/README.md b/README.md
index 260d25c3c..99d24b686 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,7 @@ Please note that the cs249r project is released with a [Contributor Code of Cond
     </tr>
     <tr>
       <td align="center" valign="top" width="20%"><a href="https://github.com/ishapira1"><img src="https://avatars.githubusercontent.com/ishapira1?s=100" width="100px;" alt="ishapira"/><br /><sub><b>ishapira</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/7e6045f81f93a2c971ce7cb66cd4587a?d=identicon&s=100?s=100" width="100px;" alt="Maximilian Lam"/><br /><sub><b>Maximilian Lam</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/c9a7c14c7ee2616e2e018176f777fbce?d=identicon&s=100?s=100" width="100px;" alt="Maximilian Lam"/><br /><sub><b>Maximilian Lam</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/Mjrovai"><img src="https://avatars.githubusercontent.com/Mjrovai?s=100" width="100px;" alt="Marcelo Rovai"/><br /><sub><b>Marcelo Rovai</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/jaysonzlin"><img src="https://avatars.githubusercontent.com/jaysonzlin?s=100" width="100px;" alt="Jayson Lin"/><br /><sub><b>Jayson Lin</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/18jeffreyma"><img src="https://avatars.githubusercontent.com/18jeffreyma?s=100" width="100px;" alt="Jeffrey Ma"/><br /><sub><b>Jeffrey Ma</b></sub></a><br /></td>
@@ -78,7 +78,7 @@ Please note that the cs249r project is released with a [Contributor Code of Cond
       <td align="center" valign="top" width="20%"><a href="https://github.com/andreamurillomtz"><img src="https://avatars.githubusercontent.com/andreamurillomtz?s=100" width="100px;" alt="Andrea Murillo"/><br /><sub><b>Andrea Murillo</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/arnaumarin"><img src="https://avatars.githubusercontent.com/arnaumarin?s=100" width="100px;" alt="arnaumarin"/><br /><sub><b>arnaumarin</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/aptl26"><img src="https://avatars.githubusercontent.com/aptl26?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/89028203f82ed944d6264d55d9bd383b?d=identicon&s=100?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/f5ebab28a511b04321219bc2633441b6?d=identicon&s=100?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/zishenwan"><img src="https://avatars.githubusercontent.com/zishenwan?s=100" width="100px;" alt="Zishen"/><br /><sub><b>Zishen</b></sub></a><br /></td>
     </tr>
     <tr>
@@ -113,14 +113,14 @@ Please note that the cs249r project is released with a [Contributor Code of Cond
       <td align="center" valign="top" width="20%"><a href="https://github.com/abigailswallow"><img src="https://avatars.githubusercontent.com/abigailswallow?s=100" width="100px;" alt="abigailswallow"/><br /><sub><b>abigailswallow</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/jasonlyik"><img src="https://avatars.githubusercontent.com/jasonlyik?s=100" width="100px;" alt="Jason Yik"/><br /><sub><b>Jason Yik</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/happyappledog"><img src="https://avatars.githubusercontent.com/happyappledog?s=100" width="100px;" alt="happyappledog"/><br /><sub><b>happyappledog</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/cd08a25544d7c63e44e7029d84091ea5?d=identicon&s=100?s=100" width="100px;" alt="Annie Laurie Cook"/><br /><sub><b>Annie Laurie Cook</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/ef9591a71474687cc39e0e64b2ba0421?d=identicon&s=100?s=100" width="100px;" alt="Annie Laurie Cook"/><br /><sub><b>Annie Laurie Cook</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/sjohri20"><img src="https://avatars.githubusercontent.com/sjohri20?s=100" width="100px;" alt="Shreya Johri"/><br /><sub><b>Shreya Johri</b></sub></a><br /></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="20%"><a href="https://github.com/skmur"><img src="https://avatars.githubusercontent.com/skmur?s=100" width="100px;" alt="Sonia Murthy"/><br /><sub><b>Sonia Murthy</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/eezike"><img src="https://avatars.githubusercontent.com/eezike?s=100" width="100px;" alt="Emeka Ezike"/><br /><sub><b>Emeka Ezike</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/ciyer64"><img src="https://avatars.githubusercontent.com/ciyer64?s=100" width="100px;" alt="Curren Iyer"/><br /><sub><b>Curren Iyer</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/58536b3d9691440cb0d2c2a12115352b?d=identicon&s=100?s=100" width="100px;" alt="Costin-Andrei Oncescu"/><br /><sub><b>Costin-Andrei Oncescu</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/b22df7bfabb7428d69fdc45b8601c348?d=identicon&s=100?s=100" width="100px;" alt="Costin-Andrei Oncescu"/><br /><sub><b>Costin-Andrei Oncescu</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/vijay-edu"><img src="https://avatars.githubusercontent.com/vijay-edu?s=100" width="100px;" alt="Vijay Edupuganti"/><br /><sub><b>Vijay Edupuganti</b></sub></a><br /></td>
     </tr>
     <tr>
diff --git a/contents/contributors.qmd b/contents/contributors.qmd
index b91b156c4..1eff5d499 100644
--- a/contents/contributors.qmd
+++ b/contents/contributors.qmd
@@ -77,7 +77,7 @@ We extend our sincere thanks to the diverse group of individuals who have genero
     </tr>
     <tr>
       <td align="center" valign="top" width="20%"><a href="https://github.com/ishapira1"><img src="https://avatars.githubusercontent.com/ishapira1?s=100" width="100px;" alt="ishapira"/><br /><sub><b>ishapira</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/7e6045f81f93a2c971ce7cb66cd4587a?d=identicon&s=100?s=100" width="100px;" alt="Maximilian Lam"/><br /><sub><b>Maximilian Lam</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/c9a7c14c7ee2616e2e018176f777fbce?d=identicon&s=100?s=100" width="100px;" alt="Maximilian Lam"/><br /><sub><b>Maximilian Lam</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/Mjrovai"><img src="https://avatars.githubusercontent.com/Mjrovai?s=100" width="100px;" alt="Marcelo Rovai"/><br /><sub><b>Marcelo Rovai</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/jaysonzlin"><img src="https://avatars.githubusercontent.com/jaysonzlin?s=100" width="100px;" alt="Jayson Lin"/><br /><sub><b>Jayson Lin</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/18jeffreyma"><img src="https://avatars.githubusercontent.com/18jeffreyma?s=100" width="100px;" alt="Jeffrey Ma"/><br /><sub><b>Jeffrey Ma</b></sub></a><br /></td>
@@ -93,7 +93,7 @@ We extend our sincere thanks to the diverse group of individuals who have genero
       <td align="center" valign="top" width="20%"><a href="https://github.com/andreamurillomtz"><img src="https://avatars.githubusercontent.com/andreamurillomtz?s=100" width="100px;" alt="Andrea Murillo"/><br /><sub><b>Andrea Murillo</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/arnaumarin"><img src="https://avatars.githubusercontent.com/arnaumarin?s=100" width="100px;" alt="arnaumarin"/><br /><sub><b>arnaumarin</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/aptl26"><img src="https://avatars.githubusercontent.com/aptl26?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/89028203f82ed944d6264d55d9bd383b?d=identicon&s=100?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/f5ebab28a511b04321219bc2633441b6?d=identicon&s=100?s=100" width="100px;" alt="Aghyad Deeb"/><br /><sub><b>Aghyad Deeb</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/zishenwan"><img src="https://avatars.githubusercontent.com/zishenwan?s=100" width="100px;" alt="Zishen"/><br /><sub><b>Zishen</b></sub></a><br /></td>
     </tr>
     <tr>
@@ -128,14 +128,14 @@ We extend our sincere thanks to the diverse group of individuals who have genero
       <td align="center" valign="top" width="20%"><a href="https://github.com/abigailswallow"><img src="https://avatars.githubusercontent.com/abigailswallow?s=100" width="100px;" alt="abigailswallow"/><br /><sub><b>abigailswallow</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/jasonlyik"><img src="https://avatars.githubusercontent.com/jasonlyik?s=100" width="100px;" alt="Jason Yik"/><br /><sub><b>Jason Yik</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/happyappledog"><img src="https://avatars.githubusercontent.com/happyappledog?s=100" width="100px;" alt="happyappledog"/><br /><sub><b>happyappledog</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/cd08a25544d7c63e44e7029d84091ea5?d=identicon&s=100?s=100" width="100px;" alt="Annie Laurie Cook"/><br /><sub><b>Annie Laurie Cook</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/ef9591a71474687cc39e0e64b2ba0421?d=identicon&s=100?s=100" width="100px;" alt="Annie Laurie Cook"/><br /><sub><b>Annie Laurie Cook</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/sjohri20"><img src="https://avatars.githubusercontent.com/sjohri20?s=100" width="100px;" alt="Shreya Johri"/><br /><sub><b>Shreya Johri</b></sub></a><br /></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="20%"><a href="https://github.com/skmur"><img src="https://avatars.githubusercontent.com/skmur?s=100" width="100px;" alt="Sonia Murthy"/><br /><sub><b>Sonia Murthy</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/eezike"><img src="https://avatars.githubusercontent.com/eezike?s=100" width="100px;" alt="Emeka Ezike"/><br /><sub><b>Emeka Ezike</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/ciyer64"><img src="https://avatars.githubusercontent.com/ciyer64?s=100" width="100px;" alt="Curren Iyer"/><br /><sub><b>Curren Iyer</b></sub></a><br /></td>
-      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/58536b3d9691440cb0d2c2a12115352b?d=identicon&s=100?s=100" width="100px;" alt="Costin-Andrei Oncescu"/><br /><sub><b>Costin-Andrei Oncescu</b></sub></a><br /></td>
+      <td align="center" valign="top" width="20%"><a href="https://github.com/harvard-edge/cs249r_book/graphs/contributors"><img src="https://www.gravatar.com/avatar/b22df7bfabb7428d69fdc45b8601c348?d=identicon&s=100?s=100" width="100px;" alt="Costin-Andrei Oncescu"/><br /><sub><b>Costin-Andrei Oncescu</b></sub></a><br /></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/vijay-edu"><img src="https://avatars.githubusercontent.com/vijay-edu?s=100" width="100px;" alt="Vijay Edupuganti"/><br /><sub><b>Vijay Edupuganti</b></sub></a><br /></td>
     </tr>
     <tr>