diff --git a/scapy/config.py b/scapy/config.py
index 84a91f7ff7de335ed1004c181b520c7e83b5e52b..f50ba15d3ef6bb0d6b6f4f1bf28e053dbfc94a7f 100644
--- a/scapy/config.py
+++ b/scapy/config.py
@@ -311,7 +311,7 @@ noenum    : holds list of enum fields for which conversion to string should NOT
 AS_resolver: choose the AS resolver class to use
 extensions_paths: path or list of paths where extensions are to be looked for
 """
-    version = "2.1.0"
+    version = "2.1.0-dev"
     session = ""
     interactive = False
     stealth = "not implemented"
diff --git a/setup.py b/setup.py
index 5785158d512706f1790fb5d8599505ed4fab1f6b..4c1982481e0749f2768997fd5c18f621f39c5de6 100755
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@ if os.name == "nt":
 
 setup(
     name = 'scapy',
-    version = '2.1.0', 
+    version = '2.1.0-dev',
     packages=['scapy','scapy/arch', 'scapy/arch/windows', 'scapy/layers','scapy/asn1','scapy/tools','scapy/modules', 'scapy/crypto'],
     scripts = SCRIPTS,
     data_files = [('share/man/man1', ["doc/scapy.1.gz"])],