diff --git a/docs/whats_new.rst b/docs/whats_new.rst
index 0133f1c9..fb6d5bf7 100644
--- a/docs/whats_new.rst
+++ b/docs/whats_new.rst
@@ -1,5 +1,30 @@
 What's New
 ==========
+v3.5.2 (2022/08/15)
+-------------------
+
+New Features
+~~~~~~~~~~~~
+
+Breaking changes
+~~~~~~~~~~~~~~~~
+
+Deprecations
+~~~~~~~~~~~~
+
+Bug fixes
+~~~~~~~~~
+- Make sketch's _font_size_ optional.
+
+Documentation
+~~~~~~~~~~~~~
+
+Performance
+~~~~~~~~~~~
+
+Internal Changes
+~~~~~~~~~~~~~~~~
+
 v3.5.1 (2022/08/11)
 -------------------
 
diff --git a/pysd/_version.py b/pysd/_version.py
index 0c11babd..dae42b1b 100644
--- a/pysd/_version.py
+++ b/pysd/_version.py
@@ -1 +1 @@
-__version__ = "3.5.1"
+__version__ = "3.5.2"
diff --git a/pysd/translators/vensim/parsing_grammars/sketch.peg b/pysd/translators/vensim/parsing_grammars/sketch.peg
index b4dd0546..14f69e2d 100644
--- a/pysd/translators/vensim/parsing_grammars/sketch.peg
+++ b/pysd/translators/vensim/parsing_grammars/sketch.peg
@@ -34,7 +34,7 @@ flow_arrow =  flow_arrow_code "," anything
 other_objects = other_objects_code "," anything
 
 # fonts
-font_properties = font_name? "|" font_size "|" font_style? "|" color
+font_properties = font_name? "|" font_size? "|" font_style? "|" color
 font_style =  "B" / "I" / "U" / "S" / "V"  # italics, bold, underline, etc
 font_size =  ~r"\d+"  # this needs to be made a regex to match any font
 font_name = ~r"(?<=,)[^\|\d]+(?=\|)"
diff --git a/tests/more-tests/split_model_vensim_8_2_1/test_split_model_vensim_8_2_1.mdl b/tests/more-tests/split_model_vensim_8_2_1/test_split_model_vensim_8_2_1.mdl
index d645c2d6..97900d12 100644
--- a/tests/more-tests/split_model_vensim_8_2_1/test_split_model_vensim_8_2_1.mdl
+++ b/tests/more-tests/split_model_vensim_8_2_1/test_split_model_vensim_8_2_1.mdl
@@ -92,7 +92,7 @@ $192-192-192,0,Times New Roman|12||0-0-0|0-0-0|0-0-255|-1--1--1|255-255-255|72,7
 1,4,5,1,100,0,0,22,0,0,0,-1--1--1,,1|(480,284)|
 11,5,0,545,284,5,8,34,3,0,0,1,0,0,0,0,0,0,0,0,0
 10,6,Heating,545,296,19,8,40,3,0,0,-1,0,0,0,0,0,0,0,0,0
-10,7,Room Temperature,532,407,35,16,8,2,0,3,-1,0,0,0,128-128-128,0-0-0,|0||128-128-128,0,0,0,0,0,0
+10,7,Room Temperature,532,407,35,16,8,2,0,3,-1,0,0,0,128-128-128,0-0-0,|||128-128-128,0,0,0,0,0,0
 1,8,7,6,1,0,0,0,0,64,0,-1--1--1,,1|(608,364)|
 10,9,Characteristic Time,544,188,35,17,8,130,0,3,-1,0,0,0,128-128-128,0-0-0,|0||128-128-128,0,0,0,0,0,0
 1,10,9,6,1,0,0,0,0,64,0,-1--1--1,,1|(593,241)|