diff --git a/app/build.gradle b/app/build.gradle
index 3887fae179..d45f9258c5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -359,7 +359,7 @@ dependencies {
     def appauth_version = "0.8.1"
     def jcharset_version = "2.1"
     def apache_poi = "3.17" // Do not update
-    def outlook_parser_version = "1.8.1"
+    def outlook_parser_version = "1.7.13" // Do not update
     def reactivestreams_version = "1.0.3"
     def rxjava2_version = "2.2.21"
     def svg_version = "1.4"