diff --git a/env.yml b/env.yml
index 296ae935..9641042b 100644
--- a/env.yml
+++ b/env.yml
@@ -13,7 +13,7 @@ dependencies:
   - fsspec
   - yaspin
   - typing-extensions >=4.12.0
-  - boto3 >=1.35.0
+  - boto3 <1.36.0
   - pyroaring
 
   # Hub client
diff --git a/pyproject.toml b/pyproject.toml
index 7e41fdd4..b7fb0ccb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
 ]
 dependencies = [
     "authlib",
-    "boto3>=1.35.0",
+    "boto3 <1.36.0",
     "datamol >=0.12.1",
     "fastpdb",
     "fsspec[http]",
diff --git a/uv.lock b/uv.lock
index b5839a69..dcb468e2 100644
--- a/uv.lock
+++ b/uv.lock
@@ -317,30 +317,30 @@ css = [
 
 [[package]]
 name = "boto3"
-version = "1.35.98"
+version = "1.35.99"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
     { name = "jmespath" },
     { name = "s3transfer" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/aa/5b/60bf8560df0688ea97098c935a5ecdd595e742891ed5e85ebe7257a0ee5d/boto3-1.35.98.tar.gz", hash = "sha256:4b6274b4fe9d7113f978abea66a1f20c8a397c268c9d1b2a6c96b14a256da4a5", size = 110996 }
+sdist = { url = "https://files.pythonhosted.org/packages/f7/99/3e8b48f15580672eda20f33439fc1622bd611f6238b6d05407320e1fb98c/boto3-1.35.99.tar.gz", hash = "sha256:e0abd794a7a591d90558e92e29a9f8837d25ece8e3c120e530526fe27eba5fca", size = 111028 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/64/e4/e0aba5c388e189a145d13699f59e2ec71600eab0bd545f412d94c130e183/boto3-1.35.98-py3-none-any.whl", hash = "sha256:d0224e1499d7189b47aa7f469d96522d98df6f5702fccb20a95a436582ebcd9d", size = 139180 },
+    { url = "https://files.pythonhosted.org/packages/65/77/8bbca82f70b062181cf0ae53fd43f1ac6556f3078884bfef9da2269c06a3/boto3-1.35.99-py3-none-any.whl", hash = "sha256:83e560faaec38a956dfb3d62e05e1703ee50432b45b788c09e25107c5058bd71", size = 139178 },
 ]
 
 [[package]]
 name = "botocore"
-version = "1.35.98"
+version = "1.35.99"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jmespath" },
     { name = "python-dateutil" },
     { name = "urllib3" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/35/af/081b065f46ecb9a930a1964d1b7d275e408a03cb45ff7cd89128481dc986/botocore-1.35.98.tar.gz", hash = "sha256:d11742b3824bdeac3c89eeeaf5132351af41823bbcef8fc15e95c8250b1de09c", size = 13489772 }
+sdist = { url = "https://files.pythonhosted.org/packages/7c/9c/1df6deceee17c88f7170bad8325aa91452529d683486273928eecfd946d8/botocore-1.35.99.tar.gz", hash = "sha256:1eab44e969c39c5f3d9a3104a0836c24715579a455f12b3979a31d7cde51b3c3", size = 13490969 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/d5/bb969f907b17e03f8169df1e5c548d6719115f1a1386529c6f8776100fb0/botocore-1.35.98-py3-none-any.whl", hash = "sha256:4f1c0b687488663a774ad3a5e81a5f94fae1bcada2364cfdc48482c4dbf794d5", size = 13291578 },
+    { url = "https://files.pythonhosted.org/packages/fc/dd/d87e2a145fad9e08d0ec6edcf9d71f838ccc7acdd919acc4c0d4a93515f8/botocore-1.35.99-py3-none-any.whl", hash = "sha256:b22d27b6b617fc2d7342090d6129000af2efd20174215948c0d7ae2da0fab445", size = 13293216 },
 ]
 
 [[package]]
@@ -2212,7 +2212,7 @@ wheels = [
 
 [[package]]
 name = "polaris-lib"
-version = "0.11.1.dev1+ga807434.d20250114"
+version = "0.11.1.dev2+gf358bf2.d20250116"
 source = { editable = "." }
 dependencies = [
     { name = "authlib" },
@@ -2269,7 +2269,7 @@ doc = [
 [package.metadata]
 requires-dist = [
     { name = "authlib" },
-    { name = "boto3", specifier = ">=1.35.0" },
+    { name = "boto3", specifier = "<1.36.0" },
     { name = "datamol", specifier = ">=0.12.1" },
     { name = "fastpdb" },
     { name = "fsspec", extras = ["http"] },