diff --git a/CITATION.cff b/CITATION.cff
index 79894445..1e2e49ee 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,4 +1,4 @@
-cff-version: 1.2.0
+cff-version: 1.3.0-dev
 message: "If you use this software, please cite it as below."
 authors:
   - family-names: Suominen
@@ -33,7 +33,7 @@ authors:
     affiliation: "National Library of Finland"
 title: "Annif"
 abstract: "Annif is an automatic indexing software."
-version: 1.2.0
+version: 1.3.0-dev
 license:
   - Apache-2.0
   - GPL-3.0
diff --git a/pyproject.toml b/pyproject.toml
index ad1470fb..de8410e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "annif"
-version = "1.2.0"
+version = "1.3.0-dev"
 description = "Automated subject indexing and classification tool"
 authors = ["National Library of Finland <finto-posti@helsinki.fi>"]
 maintainers = [
diff --git a/setup.cfg b/setup.cfg
index 5f95fb96..3583efa7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.2.0
+current_version = 1.3.0-dev
 commit = True
 tag = True
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?