diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3c14c0..0cc92e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 The Reasoner Validator package is evolving along with progress in TRAPI and Biolink Model standards within the NCATS Biomedical Knowledge Translator.
 
+## 3.8.8
+- "error.knowledge_graph.edge.attribute.value.empty" should NOT be triggered by numeric zeros either!
+
 ## 3.8.7
 - Puzzling issue with validation of some qualifier values turned out to be a bug in the Biolink Model 3.5.2, resolved in 3.5.3, so fixed unit tests accordingly. This release doesn't have any core functional changes to the code but users of earlier versions should be aware that validation with Biolink Model releases earlier than 3.5.3 may give puzzling qualifier value validation messages.
 
diff --git a/DEVELOPER_NOTES.md b/DEVELOPER_NOTES.md
index 6f78cbc..622484c 100644
--- a/DEVELOPER_NOTES.md
+++ b/DEVELOPER_NOTES.md
@@ -24,10 +24,10 @@ For Github-related performance reasons, as of project release v3.8.3, the code c
 
 Steps to properly issue a new project release:
 
-1. Perform any required **codes.yaml** and **versions.yaml** updates (as above)
+1. Perform any required **codes.yaml** and TRAPI **versions.yaml** updates (as above)
 2. Run the unit test suite to ensure that nothing fails. Iterate to fix failures (in the code or in terms of revised unit tests to reflect fresh code designs)
 3. Document release changes in the **CHANGELOG.md**
-4. Update the **`[Tool Poetry]version =`** field in the **pyprojects.yaml**, e.g. "3.8.3"
+4. Update the **`[Tool Poetry]version =`** field in the **pyprojects.yaml**, e.g. "3.8.8"
 5. Run **`poetry update`** (preferably within  **`poetry shell`**)
 6. Commit or pull request merge all files (including the **poetry.lock** file) to **master**
 7. Add the equivalent Git **tag** to **master**. This should be the Semantic Version string from step 4 with an added 'v' prefix, i.e. "v3.8.3".
diff --git a/poetry.lock b/poetry.lock
index 188b970..afb1771 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1195,18 +1195,18 @@ test = ["cython", "filelock", "html5lib", "pytest (>=4.6)"]
 
 [[package]]
 name = "sphinx-rtd-theme"
-version = "1.2.2"
+version = "1.3.0"
 description = "Read the Docs theme for Sphinx"
 optional = true
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
 files = [
-    {file = "sphinx_rtd_theme-1.2.2-py2.py3-none-any.whl", hash = "sha256:6a7e7d8af34eb8fc57d52a09c6b6b9c46ff44aea5951bc831eeb9245378f3689"},
-    {file = "sphinx_rtd_theme-1.2.2.tar.gz", hash = "sha256:01c5c5a72e2d025bd23d1f06c59a4831b06e6ce6c01fdd5ebfe9986c0a880fc7"},
+    {file = "sphinx_rtd_theme-1.3.0-py2.py3-none-any.whl", hash = "sha256:46ddef89cc2416a81ecfbeaceab1881948c014b1b6e4450b815311a89fb977b0"},
+    {file = "sphinx_rtd_theme-1.3.0.tar.gz", hash = "sha256:590b030c7abb9cf038ec053b95e5380b5c70d61591eb0b552063fbe7c41f0931"},
 ]
 
 [package.dependencies]
 docutils = "<0.19"
-sphinx = ">=1.6,<7"
+sphinx = ">=1.6,<8"
 sphinxcontrib-jquery = ">=4,<5"
 
 [package.extras]
@@ -1314,13 +1314,13 @@ test = ["pytest"]
 
 [[package]]
 name = "sphinxcontrib-serializinghtml"
-version = "1.1.8"
+version = "1.1.9"
 description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)"
 optional = true
 python-versions = ">=3.9"
 files = [
-    {file = "sphinxcontrib_serializinghtml-1.1.8-py3-none-any.whl", hash = "sha256:27849e7227277333d3d32f17c138ee148a51fa01f888a41cd6d4e73bcabe2d06"},
-    {file = "sphinxcontrib_serializinghtml-1.1.8.tar.gz", hash = "sha256:aaf3026335146e688fd209b72320314b1b278320cf232e3cda198f873838511a"},
+    {file = "sphinxcontrib_serializinghtml-1.1.9-py3-none-any.whl", hash = "sha256:9b36e503703ff04f20e9675771df105e58aa029cfcbc23b8ed716019b7416ae1"},
+    {file = "sphinxcontrib_serializinghtml-1.1.9.tar.gz", hash = "sha256:0c64ff898339e1fac29abd2bf5f11078f3ec413cfe9c046d3120d7ca65530b54"},
 ]
 
 [package.dependencies]
diff --git a/pyproject.toml b/pyproject.toml
index d16ed55..e295d71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "reasoner-validator"
-version = "3.8.7"
+version = "3.8.8"
 description = "Validation tools for Reasoner API"
 authors = [
     "Richard Bruskiewich <richard.bruskiewich@delphinai.com>",