Upgrade PyYAML (elastic#9902)

Addresses https://nvd.nist.gov/vuln/detail/CVE-2017-18342. (cherry picked from commit 079807e)
ycombinator · Jan 5, 2019 · a19d863 · a19d863
1 parent eabd6b0
commit a19d863
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libbeat/tests/system/requirements.txt b/libbeat/tests/system/requirements.txt
@@ -19,7 +19,7 @@ MarkupSafe==1.0
 nose==1.3.7
 nose-timer==0.7.1
 pycodestyle==2.4.0
-PyYAML==3.12
+PyYAML==4.2b1
 redis==2.10.6
 requests==2.20.0
 six==1.11.0