diff --git a/openmc/deplete/__init__.py b/openmc/deplete/__init__.py
index 8c19615ece..f0b04c3de5 100644
--- a/openmc/deplete/__init__.py
+++ b/openmc/deplete/__init__.py
@@ -35,7 +35,10 @@ from .nuclide import *
 from .chain import *
 from .operator import *
 from .reaction_rates import *
-from .abc import *
+from .atom_number import *
 from .results import *
 from .results_list import *
 from .integrators import *
+from . import abc
+from . import cram
+from . import helpers
diff --git a/openmc/deplete/abc.py b/openmc/deplete/abc.py
index e0ed64645e..565b9e2dcf 100644
--- a/openmc/deplete/abc.py
+++ b/openmc/deplete/abc.py
@@ -24,6 +24,13 @@ from .results import Results
 from .chain import Chain
 from .results_list import ResultsList
 
+
+__all__ = [
+    "OperatorResult", "TransportOperator", "ReactionRateHelper",
+    "EnergyHelper", "FissionYieldHelper", "TalliedFissionYieldHelper",
+    "Integrator", "SIIntegrator"]
+
+
 OperatorResult = namedtuple('OperatorResult', ['k', 'rates'])
 OperatorResult.__doc__ = """\
 Result of applying transport operator
diff --git a/openmc/deplete/chain.py b/openmc/deplete/chain.py
index 510112c7c9..a2f7db8184 100644
--- a/openmc/deplete/chain.py
+++ b/openmc/deplete/chain.py
@@ -45,6 +45,8 @@ _REACTIONS = [
 ]
 
 
+__all__ = ["Chain"]
+
 def replace_missing(product, decay_data):
     """Replace missing product with suitable decay daughter.
 
diff --git a/openmc/deplete/cram.py b/openmc/deplete/cram.py
index 67a455cb35..31049bb724 100644
--- a/openmc/deplete/cram.py
+++ b/openmc/deplete/cram.py
@@ -13,8 +13,6 @@ import scipy.sparse.linalg as sla
 
 from . import comm
 
-__all__ = ["deplete", "timed_deplete", "CRAM16", "CRAM48"]
-
 
 def deplete(chain, x, rates, dt, matrix_func=None):
     """Deplete materials using given reaction rates for a specified time
diff --git a/openmc/deplete/nuclide.py b/openmc/deplete/nuclide.py
index 8896180a88..ec1668dacb 100644
--- a/openmc/deplete/nuclide.py
+++ b/openmc/deplete/nuclide.py
@@ -17,6 +17,10 @@ from numpy import empty
 
 from openmc.checkvalue import check_type
 
+__all__ = [
+    "DecayTuple", "ReactionTuple", "Nuclide", "FissionYield",
+    "FissionYieldDistribution"]
+
 
 DecayTuple = namedtuple('DecayTuple', 'type target branching_ratio')
 DecayTuple.__doc__ = """\
diff --git a/openmc/deplete/operator.py b/openmc/deplete/operator.py
index 86dbeb7550..9800bb2805 100644
--- a/openmc/deplete/operator.py
+++ b/openmc/deplete/operator.py
@@ -30,6 +30,9 @@ from .helpers import (
     FissionYieldCutoffHelper, AveragedFissionYieldHelper)
 
 
+__all__ = ["Operator", "OperatorResult"]
+
+
 def _distribute(items):
     """Distribute items across MPI communicator
 
diff --git a/openmc/deplete/reaction_rates.py b/openmc/deplete/reaction_rates.py
index cea2f19976..85c8d8998d 100644
--- a/openmc/deplete/reaction_rates.py
+++ b/openmc/deplete/reaction_rates.py
@@ -7,6 +7,9 @@ from collections import OrderedDict
 import numpy as np
 
 
+__all__ = ["ReactionRates"]
+
+
 class ReactionRates(np.ndarray):
     """Reaction rates resulting from a transport operator call
 
diff --git a/openmc/deplete/results.py b/openmc/deplete/results.py
index 6593d5fc5f..b44739bc5f 100644
--- a/openmc/deplete/results.py
+++ b/openmc/deplete/results.py
@@ -16,6 +16,9 @@ from .reaction_rates import ReactionRates
 _VERSION_RESULTS = (1, 0)
 
 
+__all__ = ["Results"]
+
+
 class Results(object):
     """Output of a depletion run
 
diff --git a/openmc/deplete/results_list.py b/openmc/deplete/results_list.py
index 3b5166ed8a..26bc8785fe 100644
--- a/openmc/deplete/results_list.py
+++ b/openmc/deplete/results_list.py
@@ -5,6 +5,9 @@ from .results import Results, _VERSION_RESULTS
 from openmc.checkvalue import check_filetype_version
 
 
+__all__ = ["ResultsList"]
+
+
 class ResultsList(list):
     """A list of openmc.deplete.Results objects