diff --git a/plugins/evernote.koplugin/clip.lua b/plugins/evernote.koplugin/clip.lua
index a5efbd102..8e255030a 100644
--- a/plugins/evernote.koplugin/clip.lua
+++ b/plugins/evernote.koplugin/clip.lua
@@ -1,7 +1,7 @@
 local DocumentRegistry = require("document/documentregistry")
 local DocSettings = require("docsettings")
 local DEBUG = require("dbg")
-local md5 = require("MD5")
+local md5 = require("ffi/MD5")
 -- lfs
 
 local MyClipping = {
@@ -220,7 +220,7 @@ function MyClipping:getImage(image)
         --doc:clipPagePNGFile(image.pos0, image.pos1,
                 --image.pboxes, image.drawer, "/tmp/"..md5(png)..".png")
         doc:close()
-        if png then return { png = png, hash = md5(png) } end
+        if png then return { png = png, hash = md5.sum(png) } end
     end
 end
 
diff --git a/plugins/kosync.koplugin/main.lua b/plugins/kosync.koplugin/main.lua
index 0d6093e92..58ac0ad7d 100644
--- a/plugins/kosync.koplugin/main.lua
+++ b/plugins/kosync.koplugin/main.lua
@@ -12,7 +12,7 @@ local Math = require("optmath")
 local DEBUG = require("dbg")
 local T = require("ffi/util").template
 local _ = require("gettext")
-local md5 = require("MD5")
+local md5 = require("ffi/MD5")
 
 local l10n = {
     _("Unknown server error."),
@@ -165,7 +165,7 @@ function KOSync:doRegister(username, password)
         custom_url = self.kosync_custom_server,
         service_spec = self.path .. "/api.json"
     }
-    local userkey = md5:sum(password)
+    local userkey = md5.sum(password)
     local ok, status, body = pcall(client.register, client, username, userkey)
     if not ok and status then
         UIManager:show(InfoMessage:new{
@@ -195,7 +195,7 @@ function KOSync:doLogin(username, password)
         custom_url = self.kosync_custom_server,
         service_spec = self.path .. "/api.json"
     }
-    local userkey = md5:sum(password)
+    local userkey = md5.sum(password)
     local ok, status, body = pcall(client.authorize, client, username, userkey)
     if not ok and status then
         UIManager:show(InfoMessage:new{