diff --git a/pyproject.toml b/pyproject.toml
index 103c22d4..31b19235 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,7 @@ pynacl = ">=1.6.2"
 pyasn1 = ">=0.6.2"
 starlette = ">=0.40,<0.48"
 urllib3 = ">=2.6.0"
+pycryptodome = ">=3.20.0,<4"
 toga-core = { version = ">=0.5.2", optional = true }
 pillow = { version = ">=12.1.1", optional = true }
 toga-gtk = { version = ">=0.5.2", optional = true }
@@ -108,6 +109,7 @@ requires = [
     "python-multipart>=0.0.22",
     "orjson>=3.11.5",
     "argon2-cffi",
+    "pycryptodome>=3.20.0,<4",
 ]
 icon = "logo/png/SeedPass-Logo-24.png"
 license = { file = "LICENSE" }
diff --git a/src/requirements.txt b/src/requirements.txt
index b9383cee..08e1de52 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -24,6 +24,7 @@ pynacl>=1.6.2,<2
 cbor2>=5.8.0,<6
 pyasn1>=0.6.2,<1
 urllib3>=2.6.0,<3
+pycryptodome>=3.20.0,<4
 
 freezegun>=1.5.4,<2
 typer>=0.12.3,<1