diff --git a/Readme.md b/Readme.md
index f6fac97..707248a 100644
--- a/Readme.md
+++ b/Readme.md
@@ -32,6 +32,13 @@ Further information can be found in the following publications:
   Nucl. Instrum. Methods Phys. Res., Sect. B <b>192</b> (3), 245-266 (2002).
   <https://doi.org/10.1016/S0168-583X(01)01166-1>
 
+### How to cite ###
+
+If you use this software in published work, please cite the relevant
+TRIM.SP references listed above and acknowledge the TrimSP GUI/tool.
+
+Repository metadata is also provided in [CITATION.cff](CITATION.cff).
+
 ### Supported platforms ###
 
 * [Linux]
diff --git a/TrimSP.html b/TrimSP.html
index c4f2288..a275856 100644
--- a/TrimSP.html
+++ b/TrimSP.html
@@ -374,6 +374,16 @@
 	      https://doi.org/10.1007/978-3-642-73513-4
 	    </a>
 	  </p>
+	  <p>
+	    If you use this software in published work, please cite the relevant
+	    TRIM.SP references and acknowledge the TrimSP GUI/tool.
+	  </p>
+	  <p>
+	    Repository metadata:
+	    <a href="https://bitbucket.org/zaher-salman/trimsp">
+	      bitbucket.org/zaher-salman/trimsp
+	    </a>
+	  </p>
 	</div>
       </div>
   </td></tr>
diff --git a/fortran/trimspNL.F b/fortran/trimspNL.F
index f8ff2a5..5f1779a 100644
--- a/fortran/trimspNL.F
+++ b/fortran/trimspNL.F
@@ -72,7 +72,7 @@ C     Maximum number of elements in each layer, was limited to 5.
       PARAMETER (MAXDNL5=MAXNL*MAXD5)
       PARAMETER (MAXNL5p2=MAXNL5*MAXNL5*MAXD)
       PARAMETER (MAXNLm15=(MAXNL-1)*MAXEL)
-      PARAMETER (TRIMSP_VERSION='1.3.2')
+      PARAMETER (TRIMSP_VERSION='1.4.0')
 C
 C     Named integer options used by the old input format.  The input
 C     file still contains the numeric values; these PARAMETER names make
diff --git a/main.js b/main.js
index 197c38b..e56af26 100644
--- a/main.js
+++ b/main.js
@@ -100,6 +100,9 @@ function showAboutDialog(parentWindow) {
 	'Maintained by the Low Energy Muons group at the Paul Scherrer Institute.',
 	'Main contributor: Zaher Salman.',
 	'',
+	'If you use this software in published work, please cite the relevant',
+	'TRIM.SP references and acknowledge the TrimSP GUI/tool.',
+	'',
 	'Key references:',
 	'J. P. Biersack and W. Eckstein, Appl. Phys. A 34, 73-94 (1984).',
 	'W. Eckstein, Computer Simulation of Ion-Solid Interactions (1991).',
diff --git a/package-lock.json b/package-lock.json
index 3da9993..29e3a0b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "TrimSP",
-  "version": "1.3.2",
+  "version": "1.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "TrimSP",
-      "version": "1.3.2",
+      "version": "1.4.0",
       "license": "GPL2",
       "dependencies": {
         "plotly.js-dist": "^1.58.4"
diff --git a/package.json b/package.json
index f4b3123..37be742 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "TrimSP",
-  "version": "1.3.2",
+  "version": "1.4.0",
   "description": "Trim.SP simulation to calculate stopping profile of implanted probes.",
   "main": "main.js",
   "scripts": {