diff --git a/docs/dictionary.md b/docs/dictionary.md
index 43d64127..7895ca20 100644
--- a/docs/dictionary.md
+++ b/docs/dictionary.md
@@ -66,7 +66,7 @@ default stress rule.
 The phonemes which are used to represent a language's sounds are based
 loosely on the Kirshenbaum ascii character representation of the
 International Phonetic Alphabet
-[www.kirshenbaum.net/IPA/ascii-ipa.pdf](http://www.kirshenbaum.net/IPA/ascii-ipa.pdf)
+[https://web.archive.org/web/20160419125856/http://www.kirshenbaum.net/IPA/ascii-ipa.pdf](http://www.kirshenbaum.net/IPA/ascii-ipa.pdf).
 
 Full list of commonly used phonemes can be found in the `phsource/phonemes`
 file.
diff --git a/docs/phoneme_model.md b/docs/phoneme_model.md
index 132f18ca..bfe3628b 100644
--- a/docs/phoneme_model.md
+++ b/docs/phoneme_model.md
@@ -353,10 +353,10 @@ specified using all three values.
 ## References
 
 1. <a name="ref1"></a> Kirshenbaum, Evan,
-   [Representing IPA phonetics in ASCII](http://www.kirshenbaum.net/IPA/faq.html) (HTML). 1993.
+   [Representing IPA phonetics in ASCII](https://web.archive.org/web/20160419125856/http://www.kirshenbaum.net/IPA/faq.html) (HTML). 1993.
 
 2. <a name="ref2"></a> Kirshenbaum, Evan,
-   [Representing IPA phonetics in ASCII](http://www.kirshenbaum.net/IPA/ascii-ipa.pdf) (PDF). 2001.
+   [Representing IPA phonetics in ASCII](https://web.archive.org/web/20160419125856/http://www.kirshenbaum.net/IPA/ascii-ipa.pdf) (PDF). 2001.
 
 3. <a name="ref3"></a> International Phonetic Association,
    [The International Phonetic Alphabet and the IPA Chart](https://www.internationalphoneticassociation.org/content/ipa-chart). 2015.
diff --git a/docs/phonemes.md b/docs/phonemes.md
index 6f65c6bd..6fa7089d 100644
--- a/docs/phonemes.md
+++ b/docs/phonemes.md
@@ -333,10 +333,10 @@ the [length](#length) suprasegmentals are used instead.
 ## References
 
 1. <a name="ref1"></a> Kirshenbaum, Evan,
-   [Representing IPA phonetics in ASCII](http://www.kirshenbaum.net/IPA/faq.html) (HTML). 1993.
+   [Representing IPA phonetics in ASCII](https://web.archive.org/web/20160419125856/http://www.kirshenbaum.net/IPA/faq.html) (HTML). 1993.
 
 2. <a name="ref2"></a> Kirshenbaum, Evan,
-   [Representing IPA phonetics in ASCII](http://www.kirshenbaum.net/IPA/ascii-ipa.pdf) (PDF). 2001.
+   [Representing IPA phonetics in ASCII](https://web.archive.org/web/20160419125856/http://www.kirshenbaum.net/IPA/ascii-ipa.pdf) (PDF). 2001.
 
 3. <a name="ref3"></a> International Phonetic Association,
    [The International Phonetic Alphabet and the IPA Chart](https://www.internationalphoneticassociation.org/content/ipa-chart). 2015.