diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+### 0.0.19
+
++ Make [passwordLookupSync](https://hackage.haskell.org/package/gi-secret-0.0.19/docs/GI-Secret-Functions.html#g:method:passwordLookupSync) return value nullable.
+
 ### 0.0.18
 
 + Depend on haskell-gi >= 0.26.9 (see [issue 439](https://github.com/haskell-gi/haskell-gi/issues/439))
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Documentation
 Autogenerated documentation for this package can be found at
 
-[https://hackage.haskell.org/package/gi-secret-0.0.18/docs/GI-Secret.html](https://hackage.haskell.org/package/gi-secret-0.0.18/docs/GI-Secret.html)
+[https://hackage.haskell.org/package/gi-secret-0.0.19/docs/GI-Secret.html](https://hackage.haskell.org/package/gi-secret-0.0.19/docs/GI-Secret.html)
 
 For general documentation on using [haskell-gi](https://github.com/haskell-gi/haskell-gi) based bindings, see [the project page](https://github.com/haskell-gi/haskell-gi) or [the Wiki](https://github.com/haskell-gi/haskell-gi/wiki).
diff --git a/Secret.overrides b/Secret.overrides
new file mode 100644
--- /dev/null
+++ b/Secret.overrides
@@ -0,0 +1,2 @@
+# Nullable return value, but not marked as such.
+set-attr Secret/password_lookupv_sync/@return-value nullable 1
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -12,8 +12,8 @@
   where name = "Secret"
         version = "1"
         pkgName = "gi-secret"
-        pkgVersion = "0.0.18"
-        overridesFile = Nothing
+        pkgVersion = "0.0.19"
+        overridesFile = Just "Secret.overrides"
         verbose = False
         outputDir = Nothing
         inheritedOverrides = [TaggedOverride "inherited:GLib" GLib.overrides, TaggedOverride "inherited:GObject" GObject.overrides, TaggedOverride "inherited:Gio" Gio.overrides]
diff --git a/gi-secret.cabal b/gi-secret.cabal
--- a/gi-secret.cabal
+++ b/gi-secret.cabal
@@ -1,5 +1,5 @@
 name:                 gi-secret
-version:              0.0.18
+version:              0.0.19
 synopsis:             Libsecret bindings
 description:          Bindings for Libsecret, autogenerated by haskell-gi.
 homepage:             https://github.com/haskell-gi/haskell-gi
@@ -11,12 +11,12 @@
 build-type:           Custom
 cabal-version:        2.0
 
-extra-source-files: README.md ChangeLog.md stack.yaml
+extra-source-files: README.md ChangeLog.md stack.yaml Secret.overrides
 
 custom-setup
       setup-depends: base >= 4.11 && < 5,
                      Cabal >= 1.24 && < 4,
-                     haskell-gi >= 0.26.9 && < 0.27,
+                     haskell-gi >= 0.26.12 && < 0.27,
                      gi-gio == 2.0.*,
                      gi-gobject == 2.0.*,
                      gi-glib == 2.0.*
@@ -30,7 +30,7 @@
       pkgconfig-depends: libsecret-1 >= 0.14 && < 1
       build-depends: base >= 4.7 && <5,
                      haskell-gi-base >= 0.26 && < 0.27,
-                     haskell-gi >= 0.26.9 && < 0.27,
+                     haskell-gi >= 0.26.12 && < 0.27,
                      haskell-gi-overloading < 1.1,
                      gi-gio == 2.0.*,
                      gi-gobject == 2.0.*,