diff --git a/.gitignore b/.gitignore
index d2238b44..b2dc99e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,5 @@ build
 AUTHORS
 ChangeLog
 bin/diskimage_builder
+*.bak
+*.orig
diff --git a/diskimage_builder/elements/debian-minimal/README.rst b/diskimage_builder/elements/debian-minimal/README.rst
index ac2591af..28e190fa 100644
--- a/diskimage_builder/elements/debian-minimal/README.rst
+++ b/diskimage_builder/elements/debian-minimal/README.rst
@@ -13,7 +13,6 @@ There are two ways to configure apt-sources:
 
    * ``DIB_DISTRIBUTION_MIRROR``: the mirror to use (default:
      `<http://ftp.us.debian.org/debian>`__)
-
    * ``DIB_DEBIAN_COMPONENTS``: (default: ``main``) a comma
      separated list of components. For Debian this can be
      e.g. ``main,contrib,non-free``.
diff --git a/diskimage_builder/elements/debian/README.rst b/diskimage_builder/elements/debian/README.rst
index e158ae95..ec391aae 100644
--- a/diskimage_builder/elements/debian/README.rst
+++ b/diskimage_builder/elements/debian/README.rst
@@ -1,8 +1,9 @@
 ======
 debian
 ======
-Create an image based on Debian. We default to unstable but DIB_RELEASE
-is mapped to any series of Debian.
+
+Create an image based on Debian. We default to unstable but
+``DIB_RELEASE`` is mapped to any series of Debian.
 
 Note that the default Debian series is `unstable`, and the default
 mirrors for Debian can be problematic for `unstable`. Because apt does
diff --git a/diskimage_builder/elements/dib-run-parts/README.rst b/diskimage_builder/elements/dib-run-parts/README.rst
new file mode 100644
index 00000000..8c2fa36c
--- /dev/null
+++ b/diskimage_builder/elements/dib-run-parts/README.rst
@@ -0,0 +1,7 @@
+=============
+dib-run-parts
+=============
+
+Install ``dib-run-parts`` into the chroot environment
+
+
diff --git a/diskimage_builder/elements/ubuntu-signed/README.rst b/diskimage_builder/elements/ubuntu-signed/README.rst
new file mode 100644
index 00000000..aee61211
--- /dev/null
+++ b/diskimage_builder/elements/ubuntu-signed/README.rst
@@ -0,0 +1,9 @@
+=============
+ubuntu-signed
+=============
+
+The ``ubuntu-signed`` element installs ``linux-signed-image-generic``
+that provides signed kernel that can be used for deploy in UEFI secure
+boot mode.
+
+.. element_deps::
diff --git a/doc/lib/element_deps.py b/doc/lib/element_deps.py
index c9b3b9c5..b9ca0bb3 100644
--- a/doc/lib/element_deps.py
+++ b/doc/lib/element_deps.py
@@ -29,13 +29,14 @@ import os
 all_elements = _find_all_elements(get_path("elements"))
 
 
-def append_dependency_list(lines, title, element, deps):
-    if not deps:
-        return
+def make_dep_list(title, deps):
+    lines = []
     lines.append(title)
     lines.append("+" * len(title))
     for dep in deps:
-        lines.append("* :doc:`../%s/README`\n" % dep)
+        lines.append("* :doc:`../%s/README`" % dep)
+    lines.append('')  # careful to end with a blank line
+    return lines
 
 
 class ElementDepsDirective(Directive):
@@ -56,11 +57,13 @@ class ElementDepsDirective(Directive):
         # This should not fail -- sphinx would be finding an element
         # that dib doesn't know about?
         element = all_elements[element_name]
-
-        append_dependency_list(lines, "Uses", element, element.depends)
-        append_dependency_list(lines, "Used by", element, element.r_depends)
+        if element.depends:
+            lines.extend(make_dep_list("Uses", element.depends))
+        if element.r_depends:
+            lines.extend(make_dep_list("Used by", element.r_depends))
 
         self.state_machine.insert_input(lines, source)
+
         return []
 
 
diff --git a/doc/source/user_guide/building_an_image.rst b/doc/source/user_guide/building_an_image.rst
index 2c886734..6811f5a5 100644
--- a/doc/source/user_guide/building_an_image.rst
+++ b/doc/source/user_guide/building_an_image.rst
@@ -238,27 +238,28 @@ size
 
 Example:
 
-::
-        - partitioning:
-            base: image0
-            label: mbr
-            partitions:
-              - name: part-01
-                flags: [ boot ]
-                size: 1GiB
-              - name: part-02
-                size: 100%
+.. code-block:: yaml
 
-        - partitioning:
-            base: data_image
-            label: mbr
-            partitions:
-              - name: data0
-                size: 33%
-              - name: data1
-                size: 50%
-              - name: data2
-                size: 100%
+   - partitioning:
+      base: image0
+      label: mbr
+      partitions:
+        - name: part-01
+          flags: [ boot ]
+          size: 1GiB
+        - name: part-02
+          size: 100%
+
+  - partitioning:
+      base: data_image
+      label: mbr
+      partitions:
+        - name: data0
+          size: 33%
+        - name: data1
+          size: 50%
+        - name: data2
+          size: 100%
 
 On the `image0` two partitions are created.  The size of the first is
 1GiB, the second uses the remaining free space.  On the `data_image`
diff --git a/setup.cfg b/setup.cfg
index ef82ce7b..5eac8745 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,6 +19,7 @@ classifier =
 all_files = 1
 build-dir = doc/build
 source-dir = doc/source
+warning-is-error = 1
 
 [files]
 packages =
@@ -36,10 +37,6 @@ keywords = _ gettext ngettext l_ lazy_gettext
 mapping_file = babel.cfg
 output_file = diskimage_builder/locale/diskimage_builder.pot
 
-[pbr]
-# TODO(jaegerandi): Set to True once pbr 1.11.0 is out.
-warnerrors = False
-
 [update_catalog]
 domain = diskimage_builder
 output_dir = diskimage_builder/locale