diff --git a/HISTORY.txt b/HISTORY.txt
index c4d66c6d..bcb413a9 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,3 +1,5 @@
+7.8.5:
+ - Edge case.
 7.8.4:
  - Flake8 checking with check --style!
 7.8.3:
diff --git a/pipenv/__version__.py b/pipenv/__version__.py
index ba9a0135..e38a202c 100644
--- a/pipenv/__version__.py
+++ b/pipenv/__version__.py
@@ -3,4 +3,4 @@
 #  //___/ / / / //___/ / //       //   / /  || / /
 # //       / / //       ((____   //   / /   ||/ /
 
-__version__ = '7.8.4'
+__version__ = '7.8.5'
diff --git a/pipenv/project.py b/pipenv/project.py
index 907194a1..7a16f965 100644
--- a/pipenv/project.py
+++ b/pipenv/project.py
@@ -208,7 +208,11 @@ class Project(object):
                         data[section][package].update(_data)
 
             # We lose comments here, but it's for the best.)
-            return contoml.loads(toml.dumps(data, preserve=True))
+            try:
+                return contoml.loads(toml.dumps(data, preserve=True))
+            except RuntimeError:
+                return toml.loads(toml.dumps(data, preserve=True))
+
         else:
             # Fallback to toml parser, for large files.
             try: