diff --git a/docs/source_docs/conf.py b/docs/source_docs/conf.py
index e4bbc5f011be06102d1e68748ad1790406511989..f4b5faa7ae63ed89cd59d8ef0f2f5efd0b263e7a 100644
--- a/docs/source_docs/conf.py
+++ b/docs/source_docs/conf.py
@@ -105,7 +105,6 @@ html_theme = 'sphinx_rtd_theme'
 #
 html_theme_options = {
     'logo_only': False,
-    'display_version': True,
     'prev_next_buttons_location': 'bottom',
     'style_external_links': False,
     'vcs_pageview_mode': '',
diff --git a/docs/source_docs/user_guide/inputs/fluid_model.rst b/docs/source_docs/user_guide/inputs/fluid_model.rst
index 4773d8277f635d6aef51aa631acd8816ddbe4a22..fbf2f84245c885828bf99716117c3cddea191bbd 100644
--- a/docs/source_docs/user_guide/inputs/fluid_model.rst
+++ b/docs/source_docs/user_guide/inputs/fluid_model.rst
@@ -220,7 +220,7 @@ are not solved.
 .. code-block:: bash
    :caption: Snippet of inputs defining a simple incompressible fluid. This is not a complete input file.
 
-   mfix.constraint_type = IncompressibleFluid
+   mfix.constraint = IncompressibleFluid
 
    mfix.advect_density  = 0
    mfix.advect_enthalpy = 0
@@ -274,7 +274,7 @@ pressure when evaluating the equation of state.
 .. code-block:: bash
    :caption: Snippet of inputs defining a simple ideal gas. This is not a complete input file.
 
-   mfix.constraint_type = IdealGasOpenSystem
+   mfix.constraint = IdealGasOpenSystem
 
    mfix.advect_density  = 1
    mfix.advect_enthalpy = 0
@@ -332,7 +332,7 @@ thermodynamic pressure for the system.
 .. code-block:: bash
    :caption: Snippet of inputs defining an idea gas with energy. This is not a complete input file.
 
-   mfix.constraint_type = IdealGasOpenSystem
+   mfix.constraint = IdealGasOpenSystem
 
    mfix.advect_density  = 1
    mfix.advect_enthalpy = 1
diff --git a/docs/source_docs/user_guide/inputs/model_options.rst b/docs/source_docs/user_guide/inputs/model_options.rst
index c6e3dade4d8a69f4405cdf888768d212014c22e6..fe31bfc33d4e2e7ad9ee3c6267efafaa3edd00fb 100644
--- a/docs/source_docs/user_guide/inputs/model_options.rst
+++ b/docs/source_docs/user_guide/inputs/model_options.rst
@@ -16,7 +16,7 @@ The following inputs are defined using the ``mfix`` prefix.
 | solve_species          | Flag to enable the time evolution of fluid species mass                    |   int    | 0                   |
 |                        | fractions.                                                                 |          |                     |
 +------------------------+----------------------------------------------------------------------------+----------+---------------------+
-| constraint_type        | Select low Mach number constraint.                                         | string   | IncompressibleFluid |
+| constraint             | Select low Mach number constraint.                                         | string   | IncompressibleFluid |
 |                        |                                                                            |          |                     |
 |                        | * ``IncompressibleFluid`` constraint is appropriate for cold flow systems  |          |                     |
 |                        |   that do not have chemical reactions. Fluid temperature and species mass  |          |                     |
diff --git a/docs/source_docs/user_guide/inputs/species_defs.rst b/docs/source_docs/user_guide/inputs/species_defs.rst
index 48a662c39e2ba38f375baa8869d3c3995b1b9073..1a600141c8cd2aa0c7d722abf1a53abb6a387481 100644
--- a/docs/source_docs/user_guide/inputs/species_defs.rst
+++ b/docs/source_docs/user_guide/inputs/species_defs.rst
@@ -101,7 +101,7 @@ local species concentrations do not affect the fluid.
 .. code-block:: bash
    :caption: Snippet of inputs defining species as passive tracers. This is not a complete input file.
 
-   mfix.constraint_type = IncompressibleFluid
+   mfix.constraint = IncompressibleFluid
 
    mfix.advect_density  = 0
    mfix.advect_enthalpy = 0
@@ -175,7 +175,7 @@ outflow boundary condition pressure which is set here to 1 atmosphere.
 .. code-block:: bash
    :caption: Snippet of inputs defining fluid as a mixture with ``NASA7-poly`` specific heat model. This is not a complete input file.
 
-   mfix.constraint_type = IdealGasOpenSystem
+   mfix.constraint = IdealGasOpenSystem
 
    mfix.advect_density  = 1
    mfix.solve_species   = 1