diff --git a/pkgs/development/libraries/libshumate/default.nix b/pkgs/development/libraries/libshumate/default.nix
index f449c5e1c1b7..0c51b9598ef2 100644
--- a/pkgs/development/libraries/libshumate/default.nix
+++ b/pkgs/development/libraries/libshumate/default.nix
@@ -22,16 +22,21 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "libshumate";
-  version = "1.2.3";
+  version = "1.3.beta";
 
   outputs = [ "out" "dev" "devdoc" ];
   outputBin = "devdoc"; # demo app
 
   src = fetchurl {
     url = "mirror://gnome/sources/libshumate/${lib.versions.majorMinor finalAttrs.version}/libshumate-${finalAttrs.version}.tar.xz";
-    hash = "sha256-TMbNc/bYcVX2J2arY+WqzEc72aDONZBpMqz8g56WTAw=";
+    hash = "sha256-VMOsrq0FRul8tMY6++U8ydK2irVCT/g/B7HZIWuuKys=";
   };
 
+  patches = [
+    # https://gitlab.gnome.org/GNOME/libshumate/-/issues/81
+    ./json-glib-192-newline-escape.patch
+  ];
+
   depsBuildBuild = [
     # required to find native gi-docgen when cross compiling
     pkg-config
diff --git a/pkgs/development/libraries/libshumate/json-glib-192-newline-escape.patch b/pkgs/development/libraries/libshumate/json-glib-192-newline-escape.patch
new file mode 100644
index 000000000000..49cead75df60
--- /dev/null
+++ b/pkgs/development/libraries/libshumate/json-glib-192-newline-escape.patch
@@ -0,0 +1,13 @@
+diff --git a/tests/vector-expression.c b/tests/vector-expression.c
+index 9e258fb..59d1d67 100644
+--- a/tests/vector-expression.c
++++ b/tests/vector-expression.c
+@@ -592,7 +592,7 @@ test_vector_expression_formatted_string ()
+   node = json_from_string ("[\"format\",\
+     \"Hello \",\
+     [\"concat\", \"world\", \"!\"], {\"font-scale\": 0.1},\
+-    \"\n\", {\"text-color\": [\"coalesce\", \"red\"]},\
++    \"\\n\", {\"text-color\": [\"coalesce\", \"red\"]},\
+     null,\
+     \"test\"\
+     ]", &error);