diff --git a/_includes/head.html b/_includes/head.html
index 0083e9a..539c4a7 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -15,6 +15,7 @@
     <meta property="og:image" content="{% if page.image %}{{ page.image | absolute_url }}{% else %}{{ site.image | absolute_url }}{% endif %}">
     <meta name="twitter:card" content="summary_large_image">
     <meta name="theme-color" content="#FFBD3F" />
+    <link rel="canonical" href="{% if page.canonical %}{{ page.canonical }}{% else %}{{ page.url | absolute_url }}{% endif %}" />
 
     <!-- KaTeX -->
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css" integrity="sha384-AfEj0r4/OFrOo5t7NnNe46zW/tFgW6x/bCJG8FqQCEo3+Aro6EYUG4+cU+KJWu/X" crossorigin="anonymous">
diff --git a/_posts/2023-03-07-lactf-stuff.md b/_posts/2023-03-07-lactf-stuff.md
index 248ab50..2dca29d 100644
--- a/_posts/2023-03-07-lactf-stuff.md
+++ b/_posts/2023-03-07-lactf-stuff.md
@@ -4,6 +4,7 @@ title: pwn/stuff | LA CTF 2023
 description: Ropping without useful gadgets
 author: Alexander Zhang
 tags: pwn ROP stack-pivot
+canonical: https://www.alexyzhang.dev/write-ups/lactf-2023/stuff/
 ---
 
 This write-up is also posted on my website at <https://www.alexyzhang.dev/write-ups/lactf-2023/stuff/>.
diff --git a/_posts/2023-03-17-dicectf-bop.md b/_posts/2023-03-17-dicectf-bop.md
index 7885193..21ef820 100644
--- a/_posts/2023-03-17-dicectf-bop.md
+++ b/_posts/2023-03-17-dicectf-bop.md
@@ -4,6 +4,7 @@ title: pwn/bop | DiceCTF 2023
 description: Reading and printing the flag with a ROP chain
 author: Alexander Zhang
 tags: pwn rop seccomp
+canonical: https://www.alexyzhang.dev/write-ups/dicectf-2023/bop/
 ---
 
 This write-up is also posted on my website at <https://www.alexyzhang.dev/write-ups/dicectf-2023/bop/>.
diff --git a/_posts/2023-05-22-angstromctf-noleek.md b/_posts/2023-05-22-angstromctf-noleek.md
index 5e32b3b..0e0977a 100644
--- a/_posts/2023-05-22-angstromctf-noleek.md
+++ b/_posts/2023-05-22-angstromctf-noleek.md
@@ -4,6 +4,7 @@ title: noleek | ångstromCTF 2023
 description: Leakless format string exploitation
 author: Alexander Zhang
 tags: pwn format-string
+canonical: https://www.alexyzhang.dev/write-ups/angstromctf-2023/noleek/
 ---
 
 This write-up is also posted on my website at <https://www.alexyzhang.dev/write-ups/angstromctf-2023/noleek/>.
diff --git a/_posts/2023-08-07-corctf-harem-scarem.md b/_posts/2023-08-07-corctf-harem-scarem.md
index 1a3836f..12716f6 100644
--- a/_posts/2023-08-07-corctf-harem-scarem.md
+++ b/_posts/2023-08-07-corctf-harem-scarem.md
@@ -4,6 +4,7 @@ title: pwn/harem-scarem | corCTF 2023
 description: Sigreturn-oriented programming with a quirky language
 author: Alexander Zhang
 tags: pwn ROP sigreturn
+canonical: https://www.alexyzhang.dev/write-ups/corctf-2023/harem-scarem/
 ---
 
 This write-up is also posted on my website at <https://www.alexyzhang.dev/write-ups/corctf-2023/harem-scarem/>.
diff --git a/_posts/2023-12-30-csaw-brainflop.md b/_posts/2023-12-30-csaw-brainflop.md
index de39fe7..2352457 100644
--- a/_posts/2023-12-30-csaw-brainflop.md
+++ b/_posts/2023-12-30-csaw-brainflop.md
@@ -4,6 +4,7 @@ title: brainflop | CSAW CTF 2023 Finals
 description: Pwning a Brainf*ck interpreter
 author: Alexander Zhang
 tags: pwn
+canonical: https://www.alexyzhang.dev/write-ups/csaw-finals-2023/brainflop/
 ---
 
 This write-up is also posted on my website at <https://www.alexyzhang.dev/write-ups/csaw-finals-2023/brainflop/>.