diff --git a/poetry.lock b/poetry.lock
index 8e81869..b8137cd 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -82,6 +82,17 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "0.4.3"
 
+[[package]]
+category = "dev"
+description = "Code coverage measurement for Python"
+name = "coverage"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "5.0.3"
+
+[package.extras]
+toml = ["toml"]
+
 [[package]]
 category = "main"
 description = "Date parsing library designed to parse dates from HTML pages"
@@ -102,7 +113,7 @@ description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8"
+version = "2.9"
 
 [[package]]
 category = "dev"
@@ -111,7 +122,7 @@ marker = "python_version < \"3.8\""
 name = "importlib-metadata"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.4.0"
+version = "1.5.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -126,7 +137,7 @@ description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
-version = "8.1.0"
+version = "8.2.0"
 
 [[package]]
 category = "main"
@@ -142,7 +153,7 @@ description = "Core utilities for Python packages"
 name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.0"
+version = "20.1"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
@@ -194,7 +205,7 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.3.2"
+version = "5.3.5"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
@@ -211,6 +222,7 @@ python = "<3.8"
 version = ">=0.12"
 
 [package.extras]
+checkqa-mypy = ["mypy (v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
@@ -238,7 +250,7 @@ description = "Alternative regular expression module, to replace re."
 name = "regex"
 optional = false
 python-versions = "*"
-version = "2020.1.8"
+version = "2020.2.20"
 
 [[package]]
 category = "main"
@@ -246,16 +258,16 @@ description = "Python HTTP for Humans."
 name = "requests"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.22.0"
+version = "2.23.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<3.1.0"
-idna = ">=2.5,<2.9"
+chardet = ">=3.0.2,<4"
+idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
 
 [[package]]
@@ -263,8 +275,8 @@ category = "main"
 description = "Python 2 and 3 compatibility utilities"
 name = "six"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "1.13.0"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.14.0"
 
 [[package]]
 category = "dev"
@@ -298,10 +310,11 @@ category = "main"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 name = "urllib3"
 optional = false
-python-versions = "*"
-version = "1.22"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+version = "1.25.8"
 
 [package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
 
@@ -319,19 +332,16 @@ description = "Backport of pathlib-compatible object wrapper for zip files"
 marker = "python_version < \"3.8\""
 name = "zipp"
 optional = false
-python-versions = ">=2.7"
-version = "1.0.0"
-
-[package.dependencies]
-more-itertools = "*"
+python-versions = ">=3.6"
+version = "3.0.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pathlib2", "contextlib2", "unittest2"]
+testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "0e7a5824506e425f34a1b69d9cd6715b1ab11ef940b18fef10abc8c429cd638a"
-python-versions = ">=3.7"
+content-hash = "b92d65d4ffee8cbf4bcf260d83caddf693bc96d893f05be307aca37be3b7ee87"
+python-versions = ">=3.7,<4"
 
 [metadata.files]
 appdirs = [
@@ -366,28 +376,61 @@ colorama = [
     {file = "colorama-0.4.3-py2.py3-none-any.whl", hash = "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff"},
     {file = "colorama-0.4.3.tar.gz", hash = "sha256:e96da0d330793e2cb9485e9ddfd918d456036c7149416295932478192f4436a1"},
 ]
+coverage = [
+    {file = "coverage-5.0.3-cp27-cp27m-macosx_10_12_x86_64.whl", hash = "sha256:cc1109f54a14d940b8512ee9f1c3975c181bbb200306c6d8b87d93376538782f"},
+    {file = "coverage-5.0.3-cp27-cp27m-macosx_10_13_intel.whl", hash = "sha256:be18f4ae5a9e46edae3f329de2191747966a34a3d93046dbdf897319923923bc"},
+    {file = "coverage-5.0.3-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:3230d1003eec018ad4a472d254991e34241e0bbd513e97a29727c7c2f637bd2a"},
+    {file = "coverage-5.0.3-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:e69215621707119c6baf99bda014a45b999d37602cb7043d943c76a59b05bf52"},
+    {file = "coverage-5.0.3-cp27-cp27m-win32.whl", hash = "sha256:1daa3eceed220f9fdb80d5ff950dd95112cd27f70d004c7918ca6dfc6c47054c"},
+    {file = "coverage-5.0.3-cp27-cp27m-win_amd64.whl", hash = "sha256:51bc7710b13a2ae0c726f69756cf7ffd4362f4ac36546e243136187cfcc8aa73"},
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+]
 dateparser = [
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 ]
 idna = [
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-    {file = "idna-2.8.tar.gz", hash = "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407"},
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 ]
 importlib-metadata = [
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 ]
 more-itertools = [
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 ]
 ofxtools = [
     {file = "ofxtools-0.8.20.tar.gz", hash = "sha256:87245679911c0c12429a476fd269611512d3e4b44cb8871159bb76ba70f8a46f"},
 ]
 packaging = [
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+    {file = "packaging-20.1-py2.py3-none-any.whl", hash = "sha256:170748228214b70b672c581a3dd610ee51f733018650740e98c7df862a583f73"},
+    {file = "packaging-20.1.tar.gz", hash = "sha256:e665345f9eef0c621aa0bf2f8d78cf6d21904eef16a93f020240b704a57f1334"},
 ]
 pathspec = [
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@@ -406,8 +449,8 @@ pyparsing = [
     {file = "pyparsing-2.4.6.tar.gz", hash = "sha256:4c830582a84fb022400b85429791bc551f1f4871c33f23e44f353119e92f969f"},
 ]
 pytest = [
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-    {file = "pytest-5.3.2.tar.gz", hash = "sha256:6b571215b5a790f9b41f19f3531c53a45cf6bb8ef2988bc1ff9afb38270b25fa"},
+    {file = "pytest-5.3.5-py3-none-any.whl", hash = "sha256:ff615c761e25eb25df19edddc0b970302d2a9091fbce0e7213298d85fb61fef6"},
+    {file = "pytest-5.3.5.tar.gz", hash = "sha256:0d5fe9189a148acc3c3eb2ac8e1ac0742cb7618c084f3d228baaec0c254b318d"},
 ]
 python-dateutil = [
     {file = "python-dateutil-2.8.1.tar.gz", hash = "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c"},
@@ -418,35 +461,35 @@ pytz = [
     {file = "pytz-2019.3.tar.gz", hash = "sha256:b02c06db6cf09c12dd25137e563b31700d3b80fcc4ad23abb7a315f2789819be"},
 ]
 regex = [
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 ]
 six = [
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-    {file = "six-1.13.0.tar.gz", hash = "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"},
+    {file = "six-1.14.0-py2.py3-none-any.whl", hash = "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"},
+    {file = "six-1.14.0.tar.gz", hash = "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a"},
 ]
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@@ -481,14 +524,14 @@ tzlocal = [
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 ]
 urllib3 = [
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+    {file = "urllib3-1.25.8.tar.gz", hash = "sha256:87716c2d2a7121198ebcb7ce7cccf6ce5e9ba539041cfbaeecfb641dc0bf6acc"},
 ]
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 zipp = [
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 ]
diff --git a/pyproject.toml b/pyproject.toml
index eb5942b..d41f8a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ classifiers = [
 ]
 
 [tool.poetry.dependencies]
-python = ">=3.7"
+python = ">=3.7,<4"
 ofxtools = "^0.8.20"
 click = "^7.0"
 dateparser = "^0.7.2"
@@ -20,6 +20,7 @@ requests = "^2.22.0"
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"
 black = "^19.10b0"
+coverage = "^5.0.3"
 
 [tool.poetry.scripts]
 ynab = 'ofx_processor.main:cli'