diff --git a/README.md b/README.md
index d9b809a..b5e0675 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,9 @@ dyalog -script pN.dyalog # Dyalog version 18.0 or later
 
 Some solutions require Dyalog APL version 17.0 or later.
 
-See also: my [solutions for 2017](https://github.com/jayfoad/aoc2017apl).
+See also:
+* My [solutions for 2015](https://github.com/jayfoad/aoc2015apl).
+* My [solutions for 2016](https://github.com/jayfoad/aoc2016apl).
+* My [solutions for 2017](https://github.com/jayfoad/aoc2017apl).
+* My [solutions for 2019](https://github.com/jayfoad/aoc2019apl).
+* My [solutions for 2020](https://github.com/jayfoad/aoc2020apl).