diff --git a/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch b/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch
index 573a53ee56..9481b9c16f 100644
--- a/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch
+++ b/meta/recipes-devtools/python/python3-cython/0001-Replace-not-predictable-build-path-prefix-with-hardc.patch
@@ -56,7 +56,7 @@ diff --git a/Cython/Compiler/ModuleNode.py b/Cython/Compiler/ModuleNode.py
 index 34f1b32..b09350b 100644
 --- a/Cython/Compiler/ModuleNode.py
 +++ b/Cython/Compiler/ModuleNode.py
-@@ -877,7 +877,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
+@@ -899,7 +899,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
          code.put_generated_by()
          if metadata:
              code.putln("/* BEGIN: Cython Metadata")
diff --git a/meta/recipes-devtools/python/python3-cython_3.2.9.bb b/meta/recipes-devtools/python/python3-cython_3.3.1.bb
similarity index 78%
rename from meta/recipes-devtools/python/python3-cython_3.2.9.bb
rename to meta/recipes-devtools/python/python3-cython_3.3.1.bb
index 3457a91490..75cde4ef70 100644
--- a/meta/recipes-devtools/python/python3-cython_3.2.9.bb
+++ b/meta/recipes-devtools/python/python3-cython_3.3.1.bb
@@ -7,12 +7,18 @@ SECTION = "devel/python"
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=61c3ee8961575861fa86c7e62bc9f69c"
 
-SRC_URI[sha256sum] = "d249c9022ab13286b17bd66f30609e800c5f95efeecb06168990c7a66cecde6c"
+SRC_URI[sha256sum] = "e0e45989e821bef6aa9ae15c7d583ab5e055f7406c4b3624e49e06d24e90375a"
 
 inherit pypi setuptools3 cython
 
 SRC_URI += "file://0001-Replace-not-predictable-build-path-prefix-with-hardc.patch"
 
+# Cython 3.3 races when it builds itself in parallel: setuptools runs
+# cythonize in threads and Cython keeps global state, which fails
+# intermittently (https://github.com/cython/cython/issues/7997, not fixed
+# in 3.3.1). Build serially until upstream fixes it.
+PARALLEL_MAKE = ""
+
 # No need to depend on self
 DEPENDS:remove = "python3-cython-native"