diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..ecb2fd9f
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,3 @@
+[flake8]
+per-file-ignores =
+    src/hyp3_isce2/logging.py:A005
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b188ace..94fc09e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [PEP 440](https://www.python.org/dev/peps/pep-0440/)
 and uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.1]
+### Fixed
+* Upgraded to `dem_sticher>=2.5.6` to resolve geoid download errors. Fixes [#215](https://github.com/ASFHyP3/hyp3-isce2/issues/215)
+
 ## [1.1.0]
 ### Removed
 * Support for Python 3.8 and 3.9 has been dropped, 3.10 is now the minimum version.
diff --git a/environment.yml b/environment.yml
index d112f464..596a7e61 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,7 +7,7 @@ dependencies:
   - numpy
   - pip
   - isce2>=2.6.3
-  - dem_stitcher>=2.4.0
+  - dem_stitcher>=2.5.6
   - rasterio
   - shapely
   - jinja2
diff --git a/pyproject.toml b/pyproject.toml
index 260771fa..040f5952 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers=[
 ]
 dependencies = [
   "numpy",
-  "dem_stitcher>=2.4.0",
+  "dem_stitcher>=2.5.6",
   "rasterio",
   "shapely",
   "jinja2",