diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02e1efc..d017a93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,6 @@
 * `util.run_model` has an input parameter `nprocs` that is passed to the solver's `run` function as `num_processors` to allow for parallel execution of the inputs if multiple parameter sets or initial conditions are provided. 
 * Moved `parm.variants.classic` to `parm.variants.twostate.classic`.
 * Moved the existing `parm.variants.precoupled` to `parm.variants.twostate.precoupled`.
-* `parm.receptor_modules` updated the extracellular volume to be 1000x the cell volume like the BNGL examples.
 
 ### Added
 * `util.load_pydream_chains` function that can load the sampled parameter vectors output from PyDREAM sampling chains.
diff --git a/parm/compartments.py b/parm/compartments.py
index 5023640..7327e90 100644
--- a/parm/compartments.py
+++ b/parm/compartments.py
@@ -157,7 +157,7 @@ def default_cell():
     #   https://github.com/RuleWorld/BNGTutorial/blob/master/CBNGL/LRR_comp.bngl
     #   https://github.com/RuleWorld/BNGTutorial/blob/master/CBNGL/LR_comp.bngl
     # We'll use 10 time the cytosolic volume
-    Parameter("Vextra", Vcyto.value * 1000)
+    Parameter("Vextra", Vcyto.value * 10)
     # Volume of the ER lumen/cisternal space.
     # It is often >10% of cell volume according to
     # Alberts et al. https://www.ncbi.nlm.nih.gov/books/NBK26841/ .
@@ -265,7 +265,7 @@ def hek293_cell():
     #   https://github.com/RuleWorld/BNGTutorial/blob/master/CBNGL/LRR_comp.bngl
     #   https://github.com/RuleWorld/BNGTutorial/blob/master/CBNGL/LR_comp.bngl
     # We'll use 10 time the cytosolic volume
-    Parameter("Vextra", Vcyto.value * 1000)
+    Parameter("Vextra", Vcyto.value * 10)
     # Volume of the ER lumen/cisternal space.
     # It is often >10% of cell volume according to
     # Alberts et al. https://www.ncbi.nlm.nih.gov/books/NBK26841/ .