diff --git a/apps/blockchain-node/pyproject.toml b/apps/blockchain-node/pyproject.toml
index b4bc96ce..61146fec 100644
--- a/apps/blockchain-node/pyproject.toml
+++ b/apps/blockchain-node/pyproject.toml
@@ -9,7 +9,7 @@ packages = [
 
 [tool.poetry.dependencies]
 python = "^3.13"
-cryptography = ">=47.0.0"
+cryptography = ">=46.0.0"
 # All dependencies managed centrally in /opt/aitbc/requirements-consolidated.txt
 # Use: ./scripts/install-profiles.sh web database blockchain
 
diff --git a/packages/py/aitbc-core/pyproject.toml b/packages/py/aitbc-core/pyproject.toml
index ad7468e3..ad4ff89c 100644
--- a/packages/py/aitbc-core/pyproject.toml
+++ b/packages/py/aitbc-core/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
-    "cryptography>=47.0.0",
+    "cryptography>=46.0.0",
     "sqlmodel>=0.0.14",
     "fastapi>=0.104.0",
     "uvicorn>=0.24.0",
diff --git a/packages/py/aitbc-crypto/pyproject.toml b/packages/py/aitbc-crypto/pyproject.toml
index 63c95fab..4c36505b 100644
--- a/packages/py/aitbc-crypto/pyproject.toml
+++ b/packages/py/aitbc-crypto/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
-    "cryptography>=47.0.0",
+    "cryptography>=46.0.0",
     "pynacl>=1.5.0"
 ]
 
diff --git a/packages/py/aitbc-sdk/pyproject.toml b/packages/py/aitbc-sdk/pyproject.toml
index d34aa725..767b0a25 100644
--- a/packages/py/aitbc-sdk/pyproject.toml
+++ b/packages/py/aitbc-sdk/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
-    "cryptography>=47.0.0",
+    "cryptography>=46.0.0",
     "requests>=2.31.0",
     "pydantic>=2.5.0",
     "httpx>=0.25.0",