diff --git a/doc/generate-api-docs.sh b/doc/generate-api-docs.sh
index ded6b9a7..4f1dfde2 100755
--- a/doc/generate-api-docs.sh
+++ b/doc/generate-api-docs.sh
@@ -61,7 +61,7 @@ for LIB in $LIBS_SORTED; do
         if grep -q 'feature(sgx_platform)' ./src/lib.rs; then
             ARGS+=" --target x86_64-fortanix-unknown-sgx"
         fi
-        cargo doc --no-deps --lib $ARGS
+        cargo +nightly doc --no-deps --lib $ARGS
         popd
     fi
 done