diff --git a/docs/installation.md b/docs/installation.md
index 9101ac0..2c15a1f 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -110,7 +110,9 @@ docker-compose up
 
 Follow the instructions for your distribution here: https://crystal-lang.org/install/
 
-Note: Invidious currently supports the following Crystal versions: `1.9.2` / `1.8.2` / `1.7.X` / `1.6.X`
+**Note:** Invidious currently supports the following Crystal versions: `1.10.x` / `1.11.x` / `1.12.x`. \
+Versions `1.9.x` and older are incompatible because we use features only present in the newer versions. \
+Versions `1.13.x` should be compatible, however we did not test it.
 
 #### Install the dependencies