diff --git a/app/build/resources/linux/debian/control.in b/app/build/resources/linux/debian/control.in
index 7b2ef9a2f..7573e0e31 100644
--- a/app/build/resources/linux/debian/control.in
+++ b/app/build/resources/linux/debian/control.in
@@ -1,6 +1,6 @@
 Package: <%= name %>
 Version: <%= version %>
-Depends: libsecret-1-dev, libgtk2.0-0, libudev0 | libudev1, libgcrypt11 | libgcrypt20, libnotify4, libxtst6, libnss3, gvfs-bin | libglib2.0-bin, xdg-utils
+Depends: libsecret-1-dev, libgtk2.0-0, libudev0 | libudev1, libgcrypt11 | libgcrypt20, libnotify4, libxtst6, libnss3, gvfs-bin | libglib2.0-bin, xdg-utils, libtidy-dev
 Suggests: gir1.2-gnomekeyring-1.0
 Section: <%= section %>
 Priority: optional
diff --git a/app/build/resources/linux/redhat/mailspring.spec.in b/app/build/resources/linux/redhat/mailspring.spec.in
index 2365fab10..58b330cb4 100644
--- a/app/build/resources/linux/redhat/mailspring.spec.in
+++ b/app/build/resources/linux/redhat/mailspring.spec.in
@@ -8,7 +8,7 @@ AutoReqProv:    no # Avoid libchromiumcontent.so missing dependency
 
 %ifarch i386 i486 i586 i686
 Recommends: lsb-core-noarch
-Requires: libXss.so.1, libsecret-1.so.0, ca-certificates
+Requires: libXss.so.1, libsecret-1.so.0, libtidy.so.5, ca-certificates
 %if 0%{?rhel} >= 8
 Requires: libappindicator-gtk3
 %else
@@ -16,7 +16,7 @@ Requires: libappindicator
 %endif
 %else
 Recommends: lsb-core-noarch
-Requires: libXss.so.1()(64bit), libsecret-1.so.0()(64bit), ca-certificates
+Requires: libXss.so.1()(64bit), libsecret-1.so.0()(64bit), libtidy.so.5()(64bit), ca-certificates
 %if 0%{?rhel} >= 8
 Requires: libappindicator-gtk3
 %else