diff --git a/Cargo.lock b/Cargo.lock
index 8ebcb29e0..05eb7ad6f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,8 +34,8 @@ checksum = "6945cc5422176fc5e602e590c2878d2c2acd9a4fe20a4baa7c28022521698ec6"
 
 [[package]]
 name = "atk"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "atk-sys",
  "bitflags",
@@ -45,8 +45,8 @@ dependencies = [
 
 [[package]]
 name = "atk-sys"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "glib-sys",
  "gobject-sys",
@@ -104,8 +104,8 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "cairo-rs"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "cairo-sys-rs",
@@ -116,8 +116,8 @@ dependencies = [
 
 [[package]]
 name = "cairo-sys-rs"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "glib-sys",
  "libc",
@@ -516,12 +516,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 
-[[package]]
-name = "fragile"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8da1b8f89c5b5a5b7e59405cfcf0bb9588e5ed19f0b57a4cd542bbba3f164a6d"
-
 [[package]]
 name = "futures"
 version = "0.3.19"
@@ -613,8 +607,8 @@ dependencies = [
 
 [[package]]
 name = "gdk"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "bitflags",
  "cairo-rs",
@@ -628,8 +622,8 @@ dependencies = [
 
 [[package]]
 name = "gdk-pixbuf"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "gdk-pixbuf-sys",
@@ -640,8 +634,8 @@ dependencies = [
 
 [[package]]
 name = "gdk-pixbuf-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "gio-sys",
  "glib-sys",
@@ -652,8 +646,8 @@ dependencies = [
 
 [[package]]
 name = "gdk-sys"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "cairo-sys-rs",
  "gdk-pixbuf-sys",
@@ -678,8 +672,8 @@ dependencies = [
 
 [[package]]
 name = "gio"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "futures-channel",
@@ -694,8 +688,8 @@ dependencies = [
 
 [[package]]
 name = "gio-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "glib-sys",
  "gobject-sys",
@@ -723,8 +717,8 @@ dependencies = [
 
 [[package]]
 name = "glib"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "futures-channel",
@@ -743,8 +737,8 @@ dependencies = [
 
 [[package]]
 name = "glib-macros"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "anyhow",
  "heck 0.4.0",
@@ -757,8 +751,8 @@ dependencies = [
 
 [[package]]
 name = "glib-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "libc",
  "system-deps",
@@ -838,8 +832,8 @@ dependencies = [
 
 [[package]]
 name = "gobject-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "glib-sys",
  "libc",
@@ -852,7 +846,6 @@ version = "0.18.2"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
- "fragile",
  "futures-channel",
  "futures-core",
  "futures-executor",
@@ -1249,6 +1242,7 @@ dependencies = [
  "glib",
  "gstreamer",
  "gstreamer-rtp-sys",
+ "libc",
  "once_cell",
 ]
 
@@ -1380,7 +1374,6 @@ version = "0.18.2"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
- "fragile",
  "futures-channel",
  "gir-format-check",
  "glib",
@@ -1434,8 +1427,8 @@ dependencies = [
 
 [[package]]
 name = "gtk"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "atk",
  "bitflags",
@@ -1456,8 +1449,8 @@ dependencies = [
 
 [[package]]
 name = "gtk-sys"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "atk-sys",
  "cairo-sys-rs",
@@ -1473,8 +1466,8 @@ dependencies = [
 
 [[package]]
 name = "gtk3-macros"
-version = "0.15.2"
-source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#38ea6aee8e9cc84db22e748869fe0363df00dbfa"
+version = "0.15.3"
+source = "git+https://github.com/gtk-rs/gtk3-rs?branch=0.15#176a97ac92a06f37f5e0567e1fd7090c707b3314"
 dependencies = [
  "anyhow",
  "proc-macro-crate",
@@ -1598,9 +1591,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.113"
+version = "0.2.116"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eef78b64d87775463c549fbd80e19249ef436ea3bf1de2a1eb7e717ec7fab1e9"
+checksum = "565dbd88872dbe4cc8a46e527f26483c1d1f7afa6b884a3bd6cd893d4f98da74"
 
 [[package]]
 name = "libloading"
@@ -1614,9 +1607,9 @@ dependencies = [
 
 [[package]]
 name = "lock_api"
-version = "0.4.5"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712a4d093c9976e24e7dbca41db895dabcbac38eb5f4045393d17a95bdfb1109"
+checksum = "88943dd7ef4a2e5a4bfa2753aaab3013e34ce2533d1996fb18ef591e315e2b3b"
 dependencies = [
  "scopeguard",
 ]
@@ -1920,8 +1913,8 @@ dependencies = [
 
 [[package]]
 name = "pango"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "glib",
@@ -1932,8 +1925,8 @@ dependencies = [
 
 [[package]]
 name = "pango-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "glib-sys",
  "gobject-sys",
@@ -1943,8 +1936,8 @@ dependencies = [
 
 [[package]]
 name = "pangocairo"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "bitflags",
  "cairo-rs",
@@ -1956,8 +1949,8 @@ dependencies = [
 
 [[package]]
 name = "pangocairo-sys"
-version = "0.15.3"
-source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#6c4c4693403372efed711595e6e2ff772c82dfff"
+version = "0.15.4"
+source = "git+https://github.com/gtk-rs/gtk-rs-core?branch=0.15#b9a17b84e2dd460792ad5adb30e4f804b4b36793"
 dependencies = [
  "cairo-sys-rs",
  "glib-sys",
@@ -2240,9 +2233,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.135"
+version = "1.0.136"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cf9235533494ea2ddcdb794665461814781c53f19d87b76e571a1c35acbad2b"
+checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
 dependencies = [
  "serde_derive",
 ]
@@ -2258,9 +2251,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.135"
+version = "1.0.136"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8dcde03d87d4c973c04be249e7d8f0b35db1c848c487bd43032808e59dd8328d"
+checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
 dependencies = [
  "proc-macro2",
  "quote",