diff --git a/.gitignore b/.gitignore
index 734b41e..7e6e656 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,4 @@
 /libadwaita-1.5.beta.tar.xz
 /libadwaita-1.5.0.tar.xz
 /libadwaita-1.5.1.tar.xz
+/libadwaita-1.6.alpha.tar.xz
diff --git a/libadwaita.spec b/libadwaita.spec
index e0584dd..d18a4f4 100644
--- a/libadwaita.spec
+++ b/libadwaita.spec
@@ -1,21 +1,18 @@
 %global apiver  1
-%global gtk_version 4.13.4
+%global gtk_version 4.15.2
 %global glib_version 2.76.0
 
 %global tarball_version %%(echo %{version} | tr '~' '.')
 
 Name:           libadwaita
-Version:        1.5.1
+Version:        1.6~alpha
 Release:        %autorelease
 Summary:        Building blocks for modern GNOME applications
 
 # part of src/adw-spring-animation.c is MIT
 License:        LGPL-2.1-or-later AND MIT
 URL:            https://gitlab.gnome.org/GNOME/libadwaita
-Source0:        https://download.gnome.org/sources/%{name}/1.5/%{name}-%{tarball_version}.tar.xz
-
-Patch0:         mismatched-va_args.patch
-Patch1:         plug-cond_1-leak.patch
+Source0:        https://download.gnome.org/sources/%{name}/1.6/%{name}-%{tarball_version}.tar.xz
 
 BuildRequires:  desktop-file-utils
 BuildRequires:  gcc
@@ -98,7 +95,8 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/*.desktop
 %license COPYING
 %doc README.md AUTHORS NEWS
 %{_bindir}/adwaita-%{apiver}-demo
-%{_libdir}/*-%{apiver}.so.0*
+%{_libdir}/%{name}-%{apiver}-internal.so.0*
+%{_libdir}/%{name}-%{apiver}.so.0*
 %{_libdir}/girepository-1.0/*.typelib
 
 %files devel
@@ -106,7 +104,8 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/*.desktop
 %{_datadir}/gir-1.0/*-%{apiver}.gir
 %{_datadir}/vala/vapi/%{name}-%{apiver}.*
 %{_includedir}/%{name}-%{apiver}/
-%{_libdir}/*-%{apiver}.so
+%{_libdir}/%{name}-%{apiver}-internal.so
+%{_libdir}/%{name}-%{apiver}.so
 %{_libdir}/pkgconfig/*-%{apiver}.pc
 
 %files doc
diff --git a/mismatched-va_args.patch b/mismatched-va_args.patch
deleted file mode 100644
index 1f49fce..0000000
--- a/mismatched-va_args.patch
+++ /dev/null
@@ -1,52 +0,0 @@
-From a717b3ee38bdf348ede2992de6b2345200f4f468 Mon Sep 17 00:00:00 2001
-From: Christian Hergert <chergert@redhat.com>
-Date: Wed, 12 Jun 2024 15:48:06 -0700
-Subject: [PATCH] va_args: fix umatched va_start()
-
-va_list on some architectures require a va_end() to restore state which
-may have been spilled. In this case it is easier to just avoid calling
-va_start() altogether.
----
- src/adw-alert-dialog.c   | 4 ++--
- src/adw-message-dialog.c | 4 ++--
- 2 files changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/adw-alert-dialog.c b/src/adw-alert-dialog.c
-index 7c002a4a..48d5d773 100644
---- a/src/adw-alert-dialog.c
-+++ b/src/adw-alert-dialog.c
-@@ -1784,11 +1784,11 @@ adw_alert_dialog_add_responses (AdwAlertDialog *self,
- 
-   g_return_if_fail (ADW_IS_ALERT_DIALOG (self));
- 
--  va_start (args, first_id);
--
-   if (!first_id)
-     return;
- 
-+  va_start (args, first_id);
-+
-   id = first_id;
-   label = va_arg (args, const char *);
- 
-diff --git a/src/adw-message-dialog.c b/src/adw-message-dialog.c
-index cb3d3548..e36876fd 100644
---- a/src/adw-message-dialog.c
-+++ b/src/adw-message-dialog.c
-@@ -1917,11 +1917,11 @@ adw_message_dialog_add_responses (AdwMessageDialog *self,
- 
-   g_return_if_fail (ADW_IS_MESSAGE_DIALOG (self));
- 
--  va_start (args, first_id);
--
-   if (!first_id)
-     return;
- 
-+  va_start (args, first_id);
-+
-   id = first_id;
-   label = va_arg (args, const char *);
- 
--- 
-2.45.1
-
diff --git a/plug-cond_1-leak.patch b/plug-cond_1-leak.patch
deleted file mode 100644
index b202495..0000000
--- a/plug-cond_1-leak.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-From 3b9f98fb670b97911fc0d307d22cbf87e6ad27e6 Mon Sep 17 00:00:00 2001
-From: Christian Hergert <chergert@redhat.com>
-Date: Wed, 12 Jun 2024 16:03:12 -0700
-Subject: [PATCH] breakpoint: plug leak of cond_1 in failure paths
-
----
- src/adw-breakpoint.c | 4 ++++
- 1 file changed, 4 insertions(+)
-
-diff --git a/src/adw-breakpoint.c b/src/adw-breakpoint.c
-index 3d69420c4..eb2710ea3 100644
---- a/src/adw-breakpoint.c
-+++ b/src/adw-breakpoint.c
-@@ -642,6 +642,7 @@ parse_multi (const char            *str,
-       return cond_1;
-     } else {
-       *error = CONDITION_PARSER_ERROR_UNKNOWN_OPERATOR;
-+      g_clear_pointer (&cond_1, adw_breakpoint_condition_free);
-       return NULL;
-     }
- 
-@@ -650,6 +651,7 @@ parse_multi (const char            *str,
-     } else {
-       *endp = (char *) str;
-       *error = CONDITION_PARSER_ERROR_UNEXPECTED_CHARACTER;
-+      g_clear_pointer (&cond_1, adw_breakpoint_condition_free);
-       return NULL;
-     }
- 
-@@ -663,6 +665,7 @@ parse_multi (const char            *str,
- 
-       if (!cond_2) {
-         *endp = (char *) str;
-+        g_clear_pointer (&cond_1, adw_breakpoint_condition_free);
-         return NULL;
-       }
- 
-@@ -679,6 +682,7 @@ parse_multi (const char            *str,
- 
-     if (!cond_2) {
-       *endp = (char *) str;
-+      g_clear_pointer (&cond_1, adw_breakpoint_condition_free);
-       return NULL;
-     }
- 
--- 
-GitLab
-
diff --git a/sources b/sources
index 0a7ad47..9707e4d 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libadwaita-1.5.1.tar.xz) = cb0cbcc8780e1e0e21a2801e3ad1cb0f2f223057faea1e1511e47abff7cccd828bf678f6ace8d650740c4c05920e5d71407a4d6b57c685159fcf94e1187c395c
+SHA512 (libadwaita-1.6.alpha.tar.xz) = 2a238f28934479945f8ae32c17861ebb32045e805652f5b5f230a4f03d4d7b8283522b8291d548b794d63e25b4baf2ac51160e25981ce17d2a3fcf3f711c3f3f