diff --git a/docs/tephi/source/conf.py b/docs/tephi/source/conf.py
index a436619..83c02c4 100644
--- a/docs/tephi/source/conf.py
+++ b/docs/tephi/source/conf.py
@@ -18,10 +18,10 @@
 
 # ensure tephi is discoverable by rtd build environment
 root = pathlib.Path(__file__).absolute().parent.parent.parent.parent
-os.environ["PYTHONPATH"] = str(root)
-sys.path.insert(0, str(root))
+os.environ["PYTHONPATH"] = str(root) + "/src"
+sys.path.insert(0, str(root) + "/src")
 
-import tephi
+from src import tephi
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
diff --git a/setup.cfg b/setup.cfg
index 65cf4f9..6760cd6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,19 +2,19 @@
 exclude =
     .git,
     docs,
-    tephi/tests/__init__.py
+    src/tephi/tests/__init__.py
     .eggs
 
 [tool:pytest]
 testpaths =
-    tephi/
+    src/tephi/
 markers =
     graphical: mark a test as a graphical test
 addopts =
     -ra
     -v
     --cov-config=.coveragerc
-    --cov=tephi
+    --cov=src/tephi
     --cov-report=term-missing
     --doctest-modules
 doctest_optionflags = NORMALIZE_WHITESPACE ELLIPSIS NUMBER
diff --git a/tephi/__init__.py b/src/tephi/__init__.py
similarity index 100%
rename from tephi/__init__.py
rename to src/tephi/__init__.py
diff --git a/tephi/_constants.py b/src/tephi/_constants.py
similarity index 100%
rename from tephi/_constants.py
rename to src/tephi/_constants.py
diff --git a/tephi/etc/test_data/barbs.txt b/src/tephi/etc/test_data/barbs.txt
similarity index 100%
rename from tephi/etc/test_data/barbs.txt
rename to src/tephi/etc/test_data/barbs.txt
diff --git a/tephi/etc/test_data/comma_sep.txt b/src/tephi/etc/test_data/comma_sep.txt
similarity index 100%
rename from tephi/etc/test_data/comma_sep.txt
rename to src/tephi/etc/test_data/comma_sep.txt
diff --git a/tephi/etc/test_data/dews.txt b/src/tephi/etc/test_data/dews.txt
similarity index 100%
rename from tephi/etc/test_data/dews.txt
rename to src/tephi/etc/test_data/dews.txt
diff --git a/tephi/etc/test_data/temps.txt b/src/tephi/etc/test_data/temps.txt
similarity index 100%
rename from tephi/etc/test_data/temps.txt
rename to src/tephi/etc/test_data/temps.txt
diff --git a/tephi/isopleths.py b/src/tephi/isopleths.py
similarity index 100%
rename from tephi/isopleths.py
rename to src/tephi/isopleths.py
diff --git a/tephi/tests/__init__.py b/src/tephi/tests/__init__.py
similarity index 100%
rename from tephi/tests/__init__.py
rename to src/tephi/tests/__init__.py
diff --git a/tephi/tests/conftest.py b/src/tephi/tests/conftest.py
similarity index 100%
rename from tephi/tests/conftest.py
rename to src/tephi/tests/conftest.py
diff --git a/tephi/tests/idiff.py b/src/tephi/tests/idiff.py
similarity index 100%
rename from tephi/tests/idiff.py
rename to src/tephi/tests/idiff.py
diff --git a/tephi/tests/results/barbs.npz b/src/tephi/tests/results/barbs.npz
similarity index 100%
rename from tephi/tests/results/barbs.npz
rename to src/tephi/tests/results/barbs.npz
diff --git a/tephi/tests/results/dews.npz b/src/tephi/tests/results/dews.npz
similarity index 100%
rename from tephi/tests/results/dews.npz
rename to src/tephi/tests/results/dews.npz
diff --git a/tephi/tests/results/imagerepo.json b/src/tephi/tests/results/imagerepo.json
similarity index 100%
rename from tephi/tests/results/imagerepo.json
rename to src/tephi/tests/results/imagerepo.json
diff --git a/tephi/tests/results/temps.npz b/src/tephi/tests/results/temps.npz
similarity index 100%
rename from tephi/tests/results/temps.npz
rename to src/tephi/tests/results/temps.npz
diff --git a/tephi/tests/test_imagerepo.py b/src/tephi/tests/test_imagerepo.py
similarity index 100%
rename from tephi/tests/test_imagerepo.py
rename to src/tephi/tests/test_imagerepo.py
diff --git a/tephi/tests/test_tephigram.py b/src/tephi/tests/test_tephigram.py
similarity index 100%
rename from tephi/tests/test_tephigram.py
rename to src/tephi/tests/test_tephigram.py
diff --git a/tephi/transforms.py b/src/tephi/transforms.py
similarity index 100%
rename from tephi/transforms.py
rename to src/tephi/transforms.py
diff --git a/tox.ini b/tox.ini
index 20d36bf..1d944c3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ setenv =
     BUILDDIR = {toxinidir}/docs/_build
 conda_env = requirements/rtd.yml
 commands =
-    sphinx-apidoc -o "{env:DOCSDIR}/api" tephi tephi/tests
+    sphinx-apidoc -o "{env:DOCSDIR}/api" src/tephi src/tephi/tests
     sphinx-build  -W --keep-going -b html -d "{env:BUILDDIR}/doctrees" "{env:DOCSDIR}" "{env:BUILDDIR}/html" {posargs}
     # when running the doctests, also check that any snippets in the
     # docs are representative of the module output