diff --git a/io.github.kotatogram.yml b/io.github.kotatogram.yml
index a7cc7b0..3150732 100644
--- a/io.github.kotatogram.yml
+++ b/io.github.kotatogram.yml
@@ -129,8 +129,8 @@ modules:
         linkflags="$LDFLAGS" -j $FLATPAK_BUILDER_N_JOBS install
     sources:
       - type: archive
-        url: https://archives.boost.io/release/1.90.0/source/boost_1_90_0.tar.bz2
-        sha256: 49551aff3b22cbc5c5a9ed3dbc92f0e23ea50a0f7325b0d198b705e8ee3fc305
+        url: https://archives.boost.io/release/1.91.0/source/boost_1_91_0.tar.bz2
+        sha256: de5e6b0e4913395c6bdfa90537febd9028ea4c0735d2cdb0cd9b45d5f51264f5
         x-checker-data:
           type: anitya
           project-id: 6845