diff --git a/README.md b/README.md
index 36af2ce..af79f6f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,12 @@ The implementation uses [Succinct Data Structures Library 2.0](https://github.co
 
 See [the wiki](https://github.com/jltsiren/gbwt/wiki) for further documentation.
 
-## References
+## Citing GBWT
+
+Jouni Sirén, Erik Garrison, Adam M. Novak, Benedict Paten, and Richard Durbin: **Haplotype-aware graph indexes**.
+[arXiv:1805.03834](https://arxiv.org/abs/1805.03834), 2018.
+
+## Other references
 
 Richard Durbin: **Efficient haplotype matching and storage using the Positional Burrows-Wheeler Transform (PBWT)**.
 Bioinformatics 30(9):1266-1272, 2014.
diff --git a/include/gbwt/utils.h b/include/gbwt/utils.h
index 8ea006b..d8ac46e 100644
--- a/include/gbwt/utils.h
+++ b/include/gbwt/utils.h
@@ -207,7 +207,7 @@ struct Version
   static void print(std::ostream& out, const std::string& tool_name, bool verbose = false, size_type new_lines = 2);
 
   const static size_type MAJOR_VERSION = 0;
-  const static size_type MINOR_VERSION = 3;
+  const static size_type MINOR_VERSION = 4;
   const static size_type PATCH_VERSION = 0;
 
   const static size_type GBWT_VERSION  = 1;