diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8aeff5cdc..826c20022 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -121,9 +121,7 @@ pygments_style = 'tango'
 # -- Options for HTML output ---------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages
-import sphinx_rtd_theme
 html_theme = 'sphinx_rtd_theme'
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 html_baseurl = "https://docs.openmc.org/en/stable/"
 
 html_logo = '_images/openmc_logo.png'
diff --git a/openmc/deplete/abc.py b/openmc/deplete/abc.py
index e6d4c1512..c5a6219c7 100644
--- a/openmc/deplete/abc.py
+++ b/openmc/deplete/abc.py
@@ -12,6 +12,7 @@ from copy import deepcopy
 from inspect import signature
 from numbers import Real, Integral
 from pathlib import Path
+from textwrap import dedent
 import time
 from typing import Optional, Union, Sequence
 from warnings import warn
@@ -526,7 +527,7 @@ class Integrator(ABC):
     r"""Abstract class for solving the time-integration for depletion
     """
 
-    _params = r"""
+    _params = dedent(r"""
     Parameters
     ----------
     operator : openmc.deplete.abc.TransportOperator
@@ -617,7 +618,7 @@ class Integrator(ABC):
 
         .. versionadded:: 0.15.3
 
-    """
+    """)
 
     def __init__(
             self,
@@ -1020,7 +1021,7 @@ class SIIntegrator(Integrator):
     the number of particles used in initial transport calculation
     """
 
-    _params = r"""
+    _params = dedent(r"""
     Parameters
     ----------
     operator : openmc.deplete.abc.TransportOperator
@@ -1108,7 +1109,7 @@ class SIIntegrator(Integrator):
 
         .. versionadded:: 0.12
 
-    """
+    """)
 
     def __init__(
             self,
diff --git a/openmc/deplete/integrators.py b/openmc/deplete/integrators.py
index 000cb2c41..7c543a6cb 100644
--- a/openmc/deplete/integrators.py
+++ b/openmc/deplete/integrators.py
@@ -22,7 +22,6 @@ class PredictorIntegrator(Integrator):
 
     .. math::
         \mathbf{n}_{i+1} = \exp\left(h\mathbf{A}(\mathbf{n}_i) \right) \mathbf{n}_i
-
     """
     _num_stages = 1
 
diff --git a/openmc/mgxs/mgxs.py b/openmc/mgxs/mgxs.py
index 1bc7f9387..b8f2b8d3f 100644
--- a/openmc/mgxs/mgxs.py
+++ b/openmc/mgxs/mgxs.py
@@ -2,6 +2,7 @@ import copy
 from numbers import Integral
 import os
 import warnings
+from textwrap import dedent
 
 import h5py
 import numpy as np
@@ -164,7 +165,7 @@ class MGXS:
 
     """
 
-    _params = """
+    _params = dedent("""
     Parameters
     ----------
     domain : openmc.Material or openmc.Cell or openmc.Universe or openmc.RegularMesh
@@ -251,7 +252,7 @@ class MGXS:
 
         .. versionadded:: 0.13.1
 
-    """
+    """)
 
     # Store whether or not the number density should be removed for microscopic
     # values of this data
diff --git a/openmc/plots.py b/openmc/plots.py
index 072a9a319..e9130f0be 100644
--- a/openmc/plots.py
+++ b/openmc/plots.py
@@ -1,6 +1,7 @@
 from collections.abc import Iterable, Mapping
 from numbers import Integral, Real
 from pathlib import Path
+from textwrap import dedent
 
 import h5py
 import lxml.etree as ET
@@ -167,7 +168,8 @@ _SVG_COLORS = {
     'yellowgreen': (154, 205, 50)
 }
 
-_PLOT_PARAMS = """
+_PLOT_PARAMS = dedent("""\
+
         Parameters
         ----------
         origin : iterable of float
@@ -249,7 +251,7 @@ _PLOT_PARAMS = """
         -------
         matplotlib.axes.Axes
             Axes containing resulting image
-"""
+""")
 
 
 # Decorator for consistently adding plot parameters to docstrings (Model.plot,
diff --git a/pyproject.toml b/pyproject.toml
index 6e8ed798e..7705de8da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,12 +41,12 @@ dependencies = [
 [project.optional-dependencies]
 depletion-mpi = ["mpi4py"]
 docs = [
-    "sphinx==5.0.2",
+    "sphinx",
     "sphinxcontrib-katex",
     "sphinx-numfig",
     "jupyter",
     "sphinxcontrib-svg2pdfconverter",
-    "sphinx-rtd-theme==1.0.0"
+    "sphinx-rtd-theme"
 ]
 test = ["packaging", "pytest", "pytest-cov", "colorama", "openpyxl"]
 ci = ["cpp-coveralls", "coveralls"]