diff --git a/app/build/resources/linux/redhat/mailspring.spec.in b/app/build/resources/linux/redhat/mailspring.spec.in
index d181ba78d..371034a80 100644
--- a/app/build/resources/linux/redhat/mailspring.spec.in
+++ b/app/build/resources/linux/redhat/mailspring.spec.in
@@ -7,9 +7,9 @@ URL:            https://getmailspring.com/
 AutoReqProv:    no # Avoid libchromiumcontent.so missing dependency
 
 %ifarch i386 i486 i586 i686
-Requires: lsb-core-noarch, libXss.so.1 libsecret-1.so.0
+Requires: lsb-core-noarch, libXss.so.1 libsecret-1.so.0 ca-certificates
 %else
-Requires: lsb-core-noarch, libXss.so.1()(64bit) libsecret-1.so.0()(64bit)
+Requires: lsb-core-noarch, libXss.so.1()(64bit) libsecret-1.so.0()(64bit) ca-certificates
 %endif
 
 %description
diff --git a/mailsync b/mailsync
index dc0e6d72b..4d117766a 160000
--- a/mailsync
+++ b/mailsync
@@ -1 +1 @@
-Subproject commit dc0e6d72b56243afaecb613328508b47d932749f
+Subproject commit 4d117766ad0af5df3e15f87e541edd5269421502