fix typos
diff --git a/custom_mutators/README.md b/custom_mutators/README.md
index 35563d0..0abce32 100644
--- a/custom_mutators/README.md
+++ b/custom_mutators/README.md
@@ -9,4 +9,4 @@
and add `AFL_CUSTOM_MUTATOR_ONLY=1` if you only want to use the custom mutator.
-Multiple custom mutators can be used by seperating their paths with `:` in the environment variable.
+Multiple custom mutators can be used by separating their paths with `:` in the environment variable.
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index e7a855f..f25f8bb 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -138,7 +138,7 @@
//" -B bitmap.txt - mutate a specific test case, use the out/fuzz_bitmap
//" "file\n"
" -C - crash exploration mode (the peruvian rabbit thing)\n"
- " -e ext - file extension for the fuzz test case case (if "
+ " -e ext - file extension for the fuzz test input file (if "
"needed)\n\n",
argv0, EXEC_TIMEOUT, MEM_LIMIT);
