diff --git a/404.html b/404.html
index 7896a64..8b81358 100644
--- a/404.html
+++ b/404.html
@@ -41,7 +41,7 @@ <h1>ERROR 404</h1>
         <div class = "tailer">
             <p> Questions, comments, or concerns? Send email to <b>duckmaster0 at protonmail dot com</b></p>
             <p> Last updated 26 August 2024</p>
-            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> licensed under the <a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT license</a></p>
+            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> dual-licensed under<a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT</a> and CC-BY 4.0</p>
         </div>
     </body>
 </html>
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diff --git a/README.md b/README.md
index f56d793..3c78054 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,10 @@ The file structure is as follows:
 * `robots.txt`
 * `sitemap.xml`
 
+# Licensing #
+
+I hereby dual-license my website under both *MIT* and *CC-BY 4.0 or later*. Purely *code-based* portions of my website may be treated as single-licensed under MIT; purely *text-based* portions may be treated as single-licensed under CC-BY 4.0.
+
 # Contributing #
 
 If you want to contribute to my personal website, there are three different ways:
@@ -40,3 +44,5 @@ If you want to contribute to my personal website, there are three different ways
 * Email me at **[duckmaster0@protonmail.com](mailto:duckmaster0@protonmail.com)** and ask me to fix the issue myself.
 
 Do note that this repo *is* my personal website, so I may reject suggestions more harshly than with more code-centric projects.
+
+To reduce legal headaches, please agree to also release your contribution(s) under both MIT and CC-BY 4.0.
diff --git a/about-me.html b/about-me.html
index aa36d0f..eb7ee25 100644
--- a/about-me.html
+++ b/about-me.html
@@ -96,7 +96,7 @@ <h2>stuff I will (potentially) do</h2>
         <div class = "tailer">
             <p> Questions, comments, or concerns? Send me email at <b>duckmaster0 at protonmail dot com</b></p>
             <p> Last updated 26 August 2024</p>
-            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> licensed under the <a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT license</a></p>
+            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> dual-licensed under<a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT</a> and CC-BY 4.0</p>
         </div>
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diff --git a/about.html b/about.html
index 2dc6ef7..8066951 100644
--- a/about.html
+++ b/about.html
@@ -53,7 +53,7 @@ <h2>copyright/licensing/etc.</h2>
         <div class = "tailer">
             <p> Questions, comments, or concerns? Send me email at <b>duckmaster0 at protonmail dot com</b></p>
             <p> Last updated 26 August 2024 AD/CE</p>
-            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> licensed under the <a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT license</a></p>
+            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> dual-licensed under<a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT</a> and CC-BY 4.0</p>
         </div>
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diff --git a/index.html b/index.html
index 400b23e..b5ee9d5 100644
--- a/index.html
+++ b/index.html
@@ -138,7 +138,7 @@ <h2>my accounts</h2>
             
             <p> Last updated 26 August 2024 AD/CE</p>
             
-            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> licensed under the <a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT license</a></p>
+            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> dual-licensed under<a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT</a> and CC-BY 4.0</p>
         </div>
     </body>
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diff --git a/legal-etc.html b/legal-etc.html
index 792fd2b..d3d62d1 100644
--- a/legal-etc.html
+++ b/legal-etc.html
@@ -30,6 +30,16 @@ <h2>mostly mathematical miscellany since 2020 AD</h2>
         </div>
         
         <div class = "middler">
+            <div class = "content-box">
+                <p>I hereby dual-license my entire personal website under the <strong>MIT</strong> and <strong>CC-BY 4.0 or later</strong> licenses. You may reuse or republish my website in any way you wish, so long as you <strong>give me credit</strong> (as CC-BY requires). I also hereby dual-license most of my textual public-facing or semi-public-facing work (e.g. Discord messages, AoPS forum posts, Wikimedia talk page messages, and the like) under <strong>CC-BY 4.0 or later</strong></p>
+
+                <p>Purely code-based parts of my website (e.g. the header, or the sitemap.xml page) may be treated as purely MIT-licensed. The textual parts of my website, if in isolation, may be treated as purely CC-BY licensed (4.0 or later). </p>
+
+                <p>Please do <strong>not</p> plagiarize my work. This would make both me and you very sad.</p>
+
+                <p>(Exception: I release most of my transcriptions on Wikisource, and images extracted from works to be used on Wikisource, into the <strong>public domain</strong>, so you do not need to give me credit personally. You should, however, credit the original author(s) of the work which I contributed to transcribing, since plagiarism is bad no matter what the original source was. For works on Wikisource that have been released under a Creative Commons license, I release my work under the same license.)</p>
+            </div>
+
             <div class = "content-box">
                 <p>There used to be a terms-and-conditions document here, but I removed it because I realized that I didn't need one. If you still want to read it, please check <a href = "https://web.archive.org/web/20210823104752/https://duck-master.github.io/legal-etc.html">the version archived by the Wayback Machine</a> or <a href = "https://github.com/duck-master/duck-master.github.io/commit/d3202b1b4f2a625373aa5c665ced524e64292982#diff-4d2da3bae8960f28d762e38c60f22717f69b4a45dc9a8d36ed17518368a52022">this github commit</a>.</p>
                 <p>For information about me in general, see the <a href = "about-me.html">main page</a>; for information about this website, see the <a href = "about.html">about page</a>.</p>
@@ -41,7 +51,7 @@ <h2>mostly mathematical miscellany since 2020 AD</h2>
             
             <p> Last updated 26 August 2024</p>
             
-            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> licensed under the <a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT license</a></p>
+            <p>(c) 2020 - 2024 duck_master; <a href = "https://github.com/duck-master/duck-master.github.io">free and open source software</a> dual-licensed under<a href = "https://github.com/duck-master/duck-master.github.io/blob/master/LICENSE">MIT</a> and CC-BY 4.0</p>
         </div>
     </body>
 </html>
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