diff --git a/envs/repl_env/pyproject.toml b/envs/repl_env/pyproject.toml
index db151660d..4cbc68c3e 100644
--- a/envs/repl_env/pyproject.toml
+++ b/envs/repl_env/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
     # REPL custom Gradio tab on /web
     "gradio>=4.0.0",
     # Document upload support in the Gradio tab (server-side only, not in the sandbox)
-    "pypdf>=4.0.0",
+    "pypdf>=6.12.0",
 ]
 
 [project.optional-dependencies]
diff --git a/envs/repl_env/uv.lock b/envs/repl_env/uv.lock
index 0cc53b282..ca2b1b933 100644
--- a/envs/repl_env/uv.lock
+++ b/envs/repl_env/uv.lock
@@ -1607,7 +1607,7 @@ requires-dist = [
     { name = "huggingface-hub", specifier = ">=0.20.0" },
     { name = "openenv", extras = ["core"], specifier = ">=0.2.3" },
     { name = "pydantic", specifier = ">=2.0.0" },
-    { name = "pypdf", specifier = ">=4.0.0" },
+    { name = "pypdf", specifier = ">=6.12.0" },
     { name = "pytest", marker = "extra == 'dev'", specifier = ">=9.0.3" },
     { name = "pytest-cov", marker = "extra == 'dev'", specifier = ">=4.0.0" },
     { name = "requests", specifier = ">=2.31.0" },
@@ -2202,14 +2202,14 @@ crypto = [
 
 [[package]]
 name = "pypdf"
-version = "6.10.2"
+version = "6.12.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/7b/3f/9f2167401c2e94833ca3b69535bad89e533b5de75fefe4197a2c224baec2/pypdf-6.10.2.tar.gz", hash = "sha256:7d09ce108eff6bf67465d461b6ef352dcb8d84f7a91befc02f904455c6eea11d", size = 5315679, upload-time = "2026-04-15T16:37:36.978Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/a2/ba/f82d1cb35b04041b5f796d4eedbaecafcbf99e83b7a2542b44a936959dd7/pypdf-6.12.0.tar.gz", hash = "sha256:061f135db8934503ed301c2d4cfaccb12f0a2ef1db11c5d0768a72a5ab4097d8", size = 6466074, upload-time = "2026-05-21T09:21:42.621Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/0c/d6/1d5c60cc17bbdf37c1552d9c03862fc6d32c5836732a0415b2d637edc2d0/pypdf-6.10.2-py3-none-any.whl", hash = "sha256:aa53be9826655b51c96741e5d7983ca224d898ac0a77896e64636810517624aa", size = 336308, upload-time = "2026-04-15T16:37:34.851Z" },
+    { url = "https://files.pythonhosted.org/packages/f4/fa/3597fb3fb28f40bf8291fdddbc4dcd51ce52fccaf1cbfca10ee9db09c69a/pypdf-6.12.0-py3-none-any.whl", hash = "sha256:a8e104ab950e655d0bcf5fa5e71317c06474bc707987335da44a210f73a8883b", size = 343457, upload-time = "2026-05-21T09:21:40.852Z" },
 ]
 
 [[package]]