diff --git a/poetry.lock b/poetry.lock
index a72f8f2..2bbffed 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -578,6 +578,14 @@ optional = false
 python-versions = "*"
 version = "1.4.1"
 
+[[package]]
+category = "main"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+name = "typing-extensions"
+optional = false
+python-versions = "*"
+version = "3.7.4.2"
+
 [[package]]
 category = "main"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
@@ -888,6 +896,11 @@ typed-ast = [
     {file = "typed_ast-1.4.1-cp39-cp39-macosx_10_15_x86_64.whl", hash = "sha256:d43943ef777f9a1c42bf4e552ba23ac77a6351de620aa9acf64ad54933ad4d34"},
     {file = "typed_ast-1.4.1.tar.gz", hash = "sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b"},
 ]
+typing-extensions = [
+    {file = "typing_extensions-3.7.4.2-py2-none-any.whl", hash = "sha256:f8d2bd89d25bc39dabe7d23df520442fa1d8969b82544370e03d88b5a591c392"},
+    {file = "typing_extensions-3.7.4.2-py3-none-any.whl", hash = "sha256:6e95524d8a547a91e08f404ae485bbb71962de46967e1b71a0cb89af24e761c5"},
+    {file = "typing_extensions-3.7.4.2.tar.gz", hash = "sha256:79ee589a3caca649a9bfd2a8de4709837400dfa00b6cc81962a1e6a1815969ae"},
+]
 urllib3 = [
     {file = "urllib3-1.25.10-py2.py3-none-any.whl", hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"},
     {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
diff --git a/pyproject.toml b/pyproject.toml
index 05eae57..d7f52d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,6 +8,7 @@ license = "MIT"
 [tool.poetry.dependencies]
 python = "^3.8"
 requests = "^2.24.0"
+typing_extensions = "^3.7.4"
 
 [tool.poetry.dev-dependencies]
 flake8 = "^3.8.3"