diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2c5eeb68..c2fbf7c3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,6 +6,8 @@ on:
     push:
         tags:
             - '*'
+    workflow_dispatch:
+        # Allow to run manually
 
 concurrency:
   # Cancel previous runs of this workflow for the same branch
diff --git a/NEWS b/NEWS
index 8a9369be..3734062e 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,11 @@
 cypari2 change log
 ==================
 
+v2.2.0 (in development)
+------
+
+- require cysignals >= 1.11.3
+
 v2.1.5
 ------
 
diff --git a/cypari2/__init__.py b/cypari2/__init__.py
index 1700c125..dbbade7e 100644
--- a/cypari2/__init__.py
+++ b/cypari2/__init__.py
@@ -1,3 +1,6 @@
 from .pari_instance import Pari
 from .handle_error import PariError
 from .gen import Gen
+from .custom_block import init_custom_block
+
+init_custom_block()
diff --git a/cypari2/custom_block.pyx b/cypari2/custom_block.pyx
new file mode 100644
index 00000000..ddbb8293
--- /dev/null
+++ b/cypari2/custom_block.pyx
@@ -0,0 +1,29 @@
+# distutils: libraries = gmp pari
+
+#*****************************************************************************
+#  Distributed under the terms of the GNU General Public License (GPL)
+#  as published by the Free Software Foundation; either version 2 of
+#  the License, or (at your option) any later version.
+#                  http://www.gnu.org/licenses/
+#*****************************************************************************
+
+from cysignals.signals cimport add_custom_signals
+
+cdef extern from "pari/pari.h":
+    int     PARI_SIGINT_block, PARI_SIGINT_pending
+
+cdef int custom_signal_is_blocked():
+    return PARI_SIGINT_block
+
+cdef void custom_signal_unblock():
+    global PARI_SIGINT_block
+    PARI_SIGINT_block = 0
+
+cdef void custom_set_pending_signal(int sig):
+    global PARI_SIGINT_pending
+    PARI_SIGINT_pending = sig
+
+def init_custom_block():
+    add_custom_signals(&custom_signal_is_blocked,
+                       &custom_signal_unblock,
+                       &custom_set_pending_signal)
diff --git a/pyproject.toml b/pyproject.toml
index a2c57359..f2c56580 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,9 @@
 [build-system]
-requires = ["setuptools",
-            "Cython>=3.0",
-            "cysignals>=1.7"]
+requires = [
+    "setuptools",
+    "Cython>=3.0",
+    "cysignals>=1.11.3",
+]
 # We need access to the autogen package at build time.
 # Hence we declare a custom build backend.
 build-backend = "_custom_build_meta"  # just re-exports setuptools.build_meta definitions
@@ -17,7 +19,7 @@ maintainers = [
     {name = "SageMath developers", email = "sage-devel@googlegroups.com"},
 ]
 dependencies = [
-    "cysignals>=1.7",
+    "cysignals>=1.11.3",
 ]
 requires-python = ">=3.9"
 readme = "README.rst"