diff --git a/CITATION.cff b/CITATION.cff
index b4bb5487..b58fd31d 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,14 +1,14 @@
-# -----------------------------------------------------------
-# CITATION file created with {cffr} R package, v1.0.0
+# --------------------------------------------
+# CITATION file created with {cffr} R package
 # See also: https://docs.ropensci.org/cffr/
-# -----------------------------------------------------------
+# --------------------------------------------
  
 cff-version: 1.2.0
 message: 'To cite package "finalsize" in publications use:'
 type: software
 license: MIT
 title: 'finalsize: Calculate the Final Size of an Epidemic'
-version: 0.2.1
+version: 0.2.1.9000
 abstract: Calculate the final size of a susceptible-infectious-recovered epidemic
   in a population with demographic variation in contact patterns and susceptibility
   to disease, as discussed in Miller (2012) <https://doi.org/10.1007/s11538-012-9749-6>.
@@ -425,3 +425,4 @@ references:
   - family-names: Eigen
     given-names: Yixuan Qiu; the authors of Eigen for the included version of
   year: '2024'
+
diff --git a/CRAN-SUBMISSION b/CRAN-SUBMISSION
deleted file mode 100644
index df5e12f8..00000000
--- a/CRAN-SUBMISSION
+++ /dev/null
@@ -1,3 +0,0 @@
-Version: 0.2.1
-Date: 2024-04-09 16:21:53 UTC
-SHA: e06c46d5909dfdc18c1fb40885a640e86127e4fb
diff --git a/DESCRIPTION b/DESCRIPTION
index a2949315..430220ec 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: finalsize
 Title: Calculate the Final Size of an Epidemic
-Version: 0.2.1
+Version: 0.2.1.9000
 Authors@R: c(
     person("Pratik", "Gupte", , "pratik.gupte@lshtm.ac.uk", role = c("aut", "cre", "cph"),
            comment = c(ORCID = "0000-0001-5294-7819")),
diff --git a/NEWS.md b/NEWS.md
index dec5079c..9e9f81ca 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,5 @@
+# finalsize (development version)
+
 # finalsize 0.2.1
 
 This patch adds: