diff --git a/scripts/fuzz.sh b/scripts/fuzz.sh
index e4774d8..53aaaaf 100755
--- a/scripts/fuzz.sh
+++ b/scripts/fuzz.sh
@@ -11,4 +11,5 @@ ${PROJECT_DIR}/scripts/atom.py <${in} >${out} \
     | ${PROJECT_DIR}/build/fuzz/atom/parser/fuzzer >${in} <${out} \
                                       ${PROJECT_DIR}/build/atom_parser_fuzzer_corpus \
                                       -only_ascii=1 \
+                                      -fork=$(($(nproc) / 2)) \
                                       "$@"