diff --git a/Flint2.cabal b/Flint2.cabal
--- a/Flint2.cabal
+++ b/Flint2.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           Flint2
-version:        0.1.0.2
+version:        0.1.0.3
 synopsis:       Haskell bindings for the flint library for number theory
 description:    A Haskell Wrapper for Flint
                 This library provides access to the functionality of the FLINT.
@@ -343,6 +343,7 @@
       arb_poly.h
       arf.h
       bool_mat.h
+      ca_ext.h
       d_mat.h
       dirichlet.h
       double_interval.h
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![examples of complex_plot in Flint2-examples](/docs/out.png)
+![examples of complex_plot in Flint2-examples](https://github.com/monien/Flint2/blob/main/docs/out.png)
 
 # Flint2
 **Flint2** provides a thin Haskell wrapper for [Flint](https://flintlib.org) C-library. 
diff --git a/csrc/ca_ext.h b/csrc/ca_ext.h
new file mode 100644
--- /dev/null
+++ b/csrc/ca_ext.h
@@ -0,0 +1,13 @@
+#ifndef CA_EXT_H_
+#define CA_EXT_H_
+
+#include <flint/flint.h>
+
+#include <flint/ca.h>
+#include <flint/ca_ext.h>
+
+void ca_ext_fprint(FILE *out, const ca_ext_t x, ca_ctx_t ctx);
+
+char * ca_ext_get_str(const ca_ext_t x, ca_ctx_t ctx);
+
+#endif // CA_EXT_H_
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name:                Flint2
-version:             0.1.0.2
+version:             0.1.0.3
 github:              "monien/Flint2"
 license:             GPL-2
 author:              "Hartmut Monien"
@@ -386,6 +386,7 @@
     - arb_poly.h
     - arf.h
     - bool_mat.h
+    - ca_ext.h
     - d_mat.h
     - dirichlet.h
     - double_interval.h