diff --git a/poetry.lock b/poetry.lock
index deceb96a..a3ec7ff3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -72,6 +72,18 @@ Werkzeug = ">=0.14"
 click = ">=5.1"
 itsdangerous = ">=0.24"
 
+[[package]]
+category = "main"
+description = "A Flask extension adding a decorator for CORS support"
+name = "flask-cors"
+optional = false
+python-versions = "*"
+version = "3.0.7"
+
+[package.dependencies]
+Flask = ">=0.9"
+Six = "*"
+
 [[package]]
 category = "main"
 description = "Clean single-source support for Python 3 and 2"
@@ -235,7 +247,7 @@ python-versions = "*"
 version = "0.6.5"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Python 2 and 3 compatibility utilities"
 name = "six"
 optional = false
@@ -310,7 +322,7 @@ python-versions = "*"
 version = "0.14.1"
 
 [metadata]
-content-hash = "683c391b6fd20804d55568584589244c28e5bf3ec928653649c87163fae7484e"
+content-hash = "82ddc81c2547151134feb6b9c7b81806a7db15d3b51868b26df7a0bb422e64c8"
 python-versions = "^3.5"
 
 [metadata.hashes]
@@ -322,6 +334,7 @@ click = ["2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13", "5b
 colorama = ["05eed71e2e327246ad6b38c540c4a3117230b19679b875190486ddd2d721422d", "f8ac84de7840f5b9c4e3347b3c1eaa50f7e49c2b07596221daec5edaabbd7c48"]
 docutils = ["02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6", "51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274", "7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"]
 flask = ["2271c0070dbcb5275fad4a82e29f23ab92682dc45f9dfbc22c02ba9b9322ce48", "a080b744b7e345ccfcbc77954861cb05b3c63786e93f2b3875e0913d44b43f05"]
+flask-cors = ["7ad56ee3b90d4955148fc25a2ecaa1124fc84298471e266a7fea59aeac4405a5", "7e90bf225fdf163d11b84b59fb17594d0580a16b97ab4e1146b1fb2737c1cfec"]
 future = ["67045236dcfd6816dc439556d009594abf643e5eb48992e36beac09c2ca659b8"]
 idna = ["c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407", "ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"]
 imagesize = ["3f349de3eb99145973fefb7dbe38554414e5c30abd0c8e4b970a7c9d09f3a1d8", "f3832918bc3c66617f92e35f5d70729187676313caa60c187eb0f28b8fe5e3b5"]
diff --git a/pyproject.toml b/pyproject.toml
index fe058673..fbd552db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ Pillow = "^5.4"
 "RPi.GPIO" = "^0.6.5"
 picamera = "^1.13"  # Lens shading requires >1.14 or RWB fork, lens-shading branch.
 openflexure-stage = "^0.2.1"
+flask-cors = "^3.0"
 
 [tool.poetry.dev-dependencies]
 sphinxcontrib-httpdomain = "^1.7"