diff --git a/requirements.txt b/requirements.txt
index 2211a735a..33fc5ea10 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ pathlib
 numpy>=1.7
 cymem>=1.30,<1.32
 preshed>=1.0.0,<2.0.0
-thinc>=6.10.1,<6.11.0
+thinc==6.10.3.dev0
 murmurhash>=0.28,<0.29
 plac<1.0.0,>=0.9.6
 ujson>=1.35
diff --git a/setup.py b/setup.py
index f52f1ad0f..c94928d6f 100755
--- a/setup.py
+++ b/setup.py
@@ -190,7 +190,7 @@ def setup_package():
                 'murmurhash>=0.28,<0.29',
                 'cymem>=1.30,<1.32',
                 'preshed>=1.0.0,<2.0.0',
-                'thinc>=6.10.1,<6.11.0',
+                'thinc==6.10.3.dev0',
                 'plac<1.0.0,>=0.9.6',
                 'pathlib',
                 'ujson>=1.35',