diff --git a/requirements.txt b/requirements.txt
index 12f19bb88..f208a2772 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # Our libraries
 cymem>=2.0.2,<2.1.0
 preshed>=3.0.2,<3.1.0
-thinc>=7.3.0,<7.4.0
+thinc==7.4.0.dev0
 blis>=0.4.0,<0.5.0
 murmurhash>=0.28.0,<1.1.0
 wasabi>=0.4.0,<1.1.0
diff --git a/setup.cfg b/setup.cfg
index 3101209e7..a0103c5a2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,13 +38,13 @@ setup_requires =
     cymem>=2.0.2,<2.1.0
     preshed>=3.0.2,<3.1.0
     murmurhash>=0.28.0,<1.1.0
-    thinc>=7.3.0,<7.4.0
+    thinc==7.4.0.dev0
 install_requires =
     # Our libraries
     murmurhash>=0.28.0,<1.1.0
     cymem>=2.0.2,<2.1.0
     preshed>=3.0.2,<3.1.0
-    thinc>=7.3.0,<7.4.0
+    thinc==7.4.0.dev0
     blis>=0.4.0,<0.5.0
     wasabi>=0.4.0,<1.1.0
     srsly>=0.1.0,<1.1.0