diff --git a/PyTeX/build/build/build_dir_spec.py b/PyTeX/build/build/build_dir_spec.py
index a477a4f..032ea22 100644
--- a/PyTeX/build/build/build_dir_spec.py
+++ b/PyTeX/build/build/build_dir_spec.py
@@ -20,7 +20,7 @@ class BuildDirConfig(Config):
         self._tex_source_root: Optional[Path] = tex_root
         self._wrapper_dir: Optional[PurePath] = wrapper_dir
 
-    def set_from_json(self, content: Dict):
+    def set_from_json(self, content: Optional[Dict]):
         content = self._fill_keys(content)
 
         self._tex_source_root = content[YAML_TEX_SOURCE_ROOT]
diff --git a/PyTeX/build/build/pytex_config.py b/PyTeX/build/build/pytex_config.py
index 876b50b..6d5df0f 100644
--- a/PyTeX/build/build/pytex_config.py
+++ b/PyTeX/build/build/pytex_config.py
@@ -38,7 +38,7 @@ class PyTeXConfig(Config):
             YAML_CONFIGS: self._configs
         }
 
-    def set_from_json(self, content: Dict):
+    def set_from_json(self, content: Optional[Dict]):
         content = self._fill_keys(content)
 
         build = content[YAML_BUILD]
diff --git a/PyTeX/format/config.py b/PyTeX/format/config.py
index 3ba24cf..2e5bbcb 100644
--- a/PyTeX/format/config.py
+++ b/PyTeX/format/config.py
@@ -48,7 +48,7 @@ class Config:
             path: Dict = yaml.safe_load(config)
         return cls.from_json(path)
 
-    def set_from_json(self, content: Dict):
+    def set_from_json(self, content: Optional[Dict]):
         raise NotImplementedError
 
     def to_json(self) -> Dict:
@@ -77,11 +77,14 @@ class Config:
                 pass  # TODO
 
     @classmethod
-    def _fill_keys(cls, dictionary: Dict):
-        return recursive_merge_dictionaries(
-            cls().to_json(),
-            dictionary
-        )
+    def _fill_keys(cls, dictionary: Optional[Dict]):
+        if dictionary is None:
+            return cls().to_json()
+        else:
+            return recursive_merge_dictionaries(
+                cls().to_json(),
+                dictionary
+            )
 
 
 def recursive_merge_dictionaries(dict1: Dict, dict2: Dict) -> Dict:
diff --git a/PyTeX/format/constants.py b/PyTeX/format/constants.py
index b1c08cf..adff2ac 100644
--- a/PyTeX/format/constants.py
+++ b/PyTeX/format/constants.py
@@ -31,4 +31,4 @@ YAML_TEX_TYPE = 'type'
 YAML_TEXT = 'text'
 YAML_REPO = 'repo'
 YAML_PYTEX = 'pytex'
-YAML_DOCSTRIP = 'docstrip'
+YAML_DOCSTRIP = 'docstrip'
\ No newline at end of file
diff --git a/PyTeX/format/formatting_config.py b/PyTeX/format/formatting_config.py
index 8a07b27..9392620 100644
--- a/PyTeX/format/formatting_config.py
+++ b/PyTeX/format/formatting_config.py
@@ -1,18 +1,33 @@
 from typing import List, Optional, Dict, Union
 
-from .config import Config
 from .constants import *
 from .enums import NamingScheme
 from .enums import TeXType, TeXFlavour
 from .generic_text import GenericText
 from .git_version_info import GitVersionInfo
+from .config import Config
 
 
-class VersionInfo:
+class VersionInfo(Config):
     def __init__(self):
         self._repo_version: Optional[GitVersionInfo] = None
         self._pytex_version: Optional[GitVersionInfo] = None
 
+    def set_from_json(self, content: Optional[Dict]):
+        content = self._fill_keys(content)
+        self._repo_version = GitVersionInfo.from_json(
+            content[YAML_REPO]
+        )
+        self._pytex_version = GitVersionInfo.from_json(
+            content[YAML_PYTEX]
+        )
+
+    def to_json(self) -> Dict:
+        return {
+            YAML_PYTEX: self._pytex_version.to_json(),
+            YAML_REPO: self._repo_version.to_json()
+        }
+
     @property
     def pytex_version(self) -> Optional[GitVersionInfo]:
         if self._pytex_version is None:
@@ -58,7 +73,7 @@ class FormattingConfig(Config):
         self._tex_type: Optional[TeXType] = None
         self._tex_flavour: Optional[TeXFlavour] = None
 
-    def set_from_json(self, content: Dict):
+    def set_from_json(self, content: Optional[Dict]):
         content = self._fill_keys(content)
 
         info = content[YAML_INFO]
diff --git a/PyTeX/format/git_version_info.py b/PyTeX/format/git_version_info.py
index 7d3923a..a14ff3c 100644
--- a/PyTeX/format/git_version_info.py
+++ b/PyTeX/format/git_version_info.py
@@ -12,7 +12,7 @@ class GitVersionInfo(Config):
         self._branch: Optional[str] = None
         self._version: Optional[str] = None
 
-    def set_from_json(self, content: Dict):
+    def set_from_json(self, content: Optional[Dict]):
         content = self._fill_keys(content)
         self._branch = content[JSON_BRANCH]
         self._dirty = content[JSON_DIRTY]