diff --git a/src/flatpak-bwrap-private.h b/src/flatpak-bwrap-private.h
index 92d6e9de26a5982712aa034a26754fc9cab8853a..98cd82ebe827ed6d69570654aeed53553824bdb1 100644
--- a/src/flatpak-bwrap-private.h
+++ b/src/flatpak-bwrap-private.h
@@ -1,4 +1,7 @@
 /*
+ * Taken from Flatpak
+ * Last updated: Flatpak 1.6.1
+ *
  * Copyright © 2014-2018 Red Hat, Inc
  *
  * This program is free software; you can redistribute it and/or
diff --git a/src/flatpak-bwrap.c b/src/flatpak-bwrap.c
index 89e46380b0764c5e71af1a33dcd44bc640e84006..cdfc7ff2c17e783d1f350b4d13472dbf8d13c710 100644
--- a/src/flatpak-bwrap.c
+++ b/src/flatpak-bwrap.c
@@ -1,4 +1,7 @@
 /*
+ * Taken from Flatpak
+ * Last updated: Flatpak 1.6.1
+ *
  * Copyright © 2014-2018 Red Hat, Inc
  *
  * This program is free software; you can redistribute it and/or
diff --git a/src/flatpak-run-private.h b/src/flatpak-run-private.h
index e528dc7708e6f0f00a32fcc8a0d8440bd93bcd47..24f1a8fd77b06fed406050c2cba0c7bb7dc44868 100644
--- a/src/flatpak-run-private.h
+++ b/src/flatpak-run-private.h
@@ -1,5 +1,6 @@
 /*
  * Cut-down version of common/flatpak-run-private.h from Flatpak
+ * Last updated: Flatpak 1.6.1
  *
  * Copyright © 2017-2019 Collabora Ltd.
  * Copyright © 2014-2019 Red Hat, Inc
diff --git a/src/flatpak-run.c b/src/flatpak-run.c
index 5404ea5338d78891ec8691d5be0e8207684120be..94a20e25ee64917ddfe8323f8fd7086aff9db868 100644
--- a/src/flatpak-run.c
+++ b/src/flatpak-run.c
@@ -1,5 +1,6 @@
 /*
  * Cut-down version of common/flatpak-run.c from Flatpak
+ * Last updated: Flatpak 1.6.1
  *
  * Copyright © 2017-2019 Collabora Ltd.
  * Copyright © 2014-2019 Red Hat, Inc
diff --git a/src/flatpak-utils-base-private.h b/src/flatpak-utils-base-private.h
index 181a0c9587f95368693a38c8b4fa5157595f3077..751686b7b13924bfc90f537e797de5ccdae240e4 100644
--- a/src/flatpak-utils-base-private.h
+++ b/src/flatpak-utils-base-private.h
@@ -1,4 +1,5 @@
 /*
+ * Taken from Flatpak, last updated: Flatpak 1.6.1
  * Copyright © 2019 Red Hat, Inc
  *
  * This program is free software; you can redistribute it and/or
diff --git a/src/flatpak-utils-base.c b/src/flatpak-utils-base.c
index fc2f365df88f8b872643b7acee40da55aefd1969..23ec448b72e3ee390613a233064f5eb6c681d70e 100644
--- a/src/flatpak-utils-base.c
+++ b/src/flatpak-utils-base.c
@@ -1,5 +1,5 @@
 /*
- * Taken from Flatpak
+ * Taken from Flatpak, last updated: Flatpak 1.6.1
  * Copyright © 2019 Red Hat, Inc
  *
  * This program is free software; you can redistribute it and/or
diff --git a/src/flatpak-utils.c b/src/flatpak-utils.c
index 5f605bb5755442f1573f873e67c58b41bc44dad7..d796878008461472273a2f325a7540905fd6fb3c 100644
--- a/src/flatpak-utils.c
+++ b/src/flatpak-utils.c
@@ -1,5 +1,6 @@
 /*
  * A cut-down version of common/flatpak-utils from Flatpak
+ * Last updated: Flatpak 1.6.1
  *
  * Copyright © 2014-2019 Red Hat, Inc
  *