diff --git a/webapp/src/main/webapp/js/d3.min.js b/webapp/src/main/webapp/js/d3.min.js
index 1984d172..6ba6b41e 100644
--- a/webapp/src/main/webapp/js/d3.min.js
+++ b/webapp/src/main/webapp/js/d3.min.js
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e=-Math.sqrt(n/(3*Bb));t.moveTo(0,2*e),t.lineTo(-Bb*e,-e),t.lineTo(Bb*e,-e),t.closePath()}},Hb=-.5,Xb=Math.sqrt(3)/2,Vb=1/Math.sqrt(12),$b=3*(Vb/2+1),Wb={draw:function(t,n){var e=Math.sqrt(n/$b),r=e/2,i=e*Vb,o=r,u=e*Vb+e,a=-o,c=u;t.moveTo(r,i),t.lineTo(o,u),t.lineTo(a,c),t.lineTo(Hb*r-Xb*i,Xb*r+Hb*i),t.lineTo(Hb*o-Xb*u,Xb*o+Hb*u),t.lineTo(Hb*a-Xb*c,Xb*a+Hb*c),t.lineTo(Hb*r+Xb*i,Hb*i-Xb*r),t.lineTo(Hb*o+Xb*u,Hb*u-Xb*o),t.lineTo(Hb*a+Xb*c,Hb*c-Xb*a),t.closePath()}},Zb=[Pb,Lb,Ub,Yb,Ib,jb,Wb],Gb=function(){function t(){var t;if(r||(r=t=Re()),n.apply(this,arguments).draw(r,+e.apply(this,arguments)),t)return r=null,t+""||null}var n=fb(Pb),e=fb(64),r=null;return t.type=function(e){return arguments.length?(n="function"==typeof e?e:fb(e),t):n},t.size=function(n){return arguments.length?(e="function"==typeof n?n:fb(+n),t):e},t.context=function(n){return arguments.length?(r=null==n?null:n,t):r},t},Jb=function(){};mc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){switch(this._point){case 3:yc(this,this._x1,this._y1);case 2:this._context.lineTo(this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,this._context.lineTo((5*this._x0+this._x1)/6,(5*this._y0+this._y1)/6);default:yc(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}};var Qb=function(t){return new mc(t)};xc.prototype={areaStart:Jb,areaEnd:Jb,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._y0=this._y1=this._y2=this._y3=this._y4=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x2,this._y2),this._context.closePath();break;case 2:this._context.moveTo((this._x2+2*this._x3)/3,(this._y2+2*this._y3)/3),this._context.lineTo((this._x3+2*this._x2)/3,(this._y3+2*this._y2)/3),this._context.closePath();break;case 3:this.point(this._x2,this._y2),this.point(this._x3,this._y3),this.point(this._x4,this._y4)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x2=t,this._y2=n;break;case 1:this._point=2,this._x3=t,this._y3=n;break;case 2:this._point=3,this._x4=t,this._y4=n,this._context.moveTo((this._x0+4*this._x1+t)/6,(this._y0+4*this._y1+n)/6);break;default:yc(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}};var Kb=function(t){return new xc(t)};bc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3;var e=(this._x0+4*this._x1+t)/6,r=(this._y0+4*this._y1+n)/6;this._line?this._context.lineTo(e,r):this._context.moveTo(e,r);break;case 3:this._point=4;default:yc(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}};var tw=function(t){return new bc(t)};wc.prototype={lineStart:function(){this._x=[],this._y=[],this._basis.lineStart()},lineEnd:function(){var t=this._x,n=this._y,e=t.length-1;if(e>0)for(var 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2:this._point=3;default:Mc(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var ew=function t(n){function e(t){return new Tc(t,n)}return e.tension=function(n){return t(+n)},e}(0);kc.prototype={areaStart:Jb,areaEnd:Jb,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 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3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:Nc(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var uw=function t(n){function e(t){return n?new Ac(t,n):new kc(t,0)}return e.alpha=function(n){return 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n?new Cc(t,n):new Sc(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);zc.prototype={areaStart:Jb,areaEnd:Jb,lineStart:function(){this._point=0},lineEnd:function(){this._point&&this._context.closePath()},point:function(t,n){t=+t,n=+n,this._point?this._context.lineTo(t,n):(this._point=1,this._context.moveTo(t,n))}};var cw=function(t){return new zc(t)};Uc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=this._t0=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x1,this._y1);break;case 3:qc(this,this._t0,Rc(this,this._t0))}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){var e=NaN;if(t=+t,n=+n,t!==this._x1||n!==this._y1){switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,qc(this,Rc(this,e=Lc(this,t,n)),e);break;default:qc(this,this._t0,e=Lc(this,t,n))}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n,this._t0=e}}},(Dc.prototype=Object.create(Uc.prototype)).point=function(t,n){Uc.prototype.point.call(this,n,t)},Oc.prototype={moveTo:function(t,n){this._context.moveTo(n,t)},closePath:function(){this._context.closePath()},lineTo:function(t,n){this._context.lineTo(n,t)},bezierCurveTo:function(t,n,e,r,i,o){this._context.bezierCurveTo(n,t,r,e,o,i)}},Yc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=[],this._y=[]},lineEnd:function(){var t=this._x,n=this._y,e=t.length;if(e)if(this._line?this._context.lineTo(t[0],n[0]):this._context.moveTo(t[0],n[0]),2===e)this._context.lineTo(t[1],n[1]);else for(var 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\ No newline at end of file
diff --git a/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coAuthorPersonLevelD3.ftl b/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coAuthorPersonLevelD3.ftl
index 7024f052..8c91523d 100644
--- a/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coAuthorPersonLevelD3.ftl
+++ b/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coAuthorPersonLevelD3.ftl
@@ -115,10 +115,9 @@ $(document).ready(function(){
         uris.push("${collaborator.collaboratorURI}");
     </#list>
 
-    var chord = d3.layout.chord()
-            .padding(0.05)
-            .sortSubgroups(d3.descending)
-            .matrix(matrix);
+    var chord = d3.chord()
+            .padAngle(0.05)
+            .sortSubgroups(d3.descending);
 
     var width  = 725;
     var height = 725;
@@ -126,17 +125,25 @@ $(document).ready(function(){
     var inner_radius = Math.min(width, height) * 0.37;
     var outer_radius = Math.min(width, height) * 0.39;
 
-    var fill = d3.scale.category10();
+    var fill = d3.scaleOrdinal()
+            .domain(d3.range(20))
+            .range(["#000000", "#1f77b4", "#aec7e8", "#ff7f0e", "#ffbb78",
+                "#2ca02c", "#98df8a", "#d62728", "#ff9896", "#9467bd",
+                "#c5b0d5", "#8c564b", "#c49c94", "#e377c2", "#f7b6d2",
+                "#7f7f7f", "#c7c7c7", "#bcbd22", "#dbdb8d", "#17becf"
+    ]);
+    // #9edae5
 
     var svg = d3.select('#chord').append('svg')
             .attr('width', width+padding)
             .attr('height', height+padding)
-            .append('g').attr('transform', 'translate(' + (width+padding) / 2 + ',' + (height+padding) / 2 +')');
+            .append('g').attr('transform', 'translate(' + (width+padding) / 2 + ',' + (height+padding) / 2 +')')
+            .datum(chord(matrix));
 
-    svg.append('g').selectAll('path').data(chord.groups).enter()
-            .append('path').style('fill', function(val) { return val.index == 0 ? "#000000" : fill(val.index); })
-            .style('stroke', function(val) { return val.index == 0 ? "#000000" : fill(val.index); })
-            .attr('d', d3.svg.arc().innerRadius(inner_radius).outerRadius(outer_radius))
+    svg.append('g').selectAll('path').data(function(chords) { return chords.groups; }).enter()
+            .append('path').style('fill', function(val) { return fill(val.index); })
+            .style('stroke', function(val) { return fill(val.index); })
+            .attr('d', d3.arc().innerRadius(inner_radius).outerRadius(outer_radius))
             .on('click', chord_click())
             .on("mouseover", chord_hover(.05))
             .on("mouseout", chord_hover(.8));
@@ -153,7 +160,7 @@ $(document).ready(function(){
 
     var chord_ticks = svg.append('g')
             .selectAll('g')
-            .data(chord.groups)
+            .data(function (chords) { return chords.groups; })
             .enter().append('g')
             .selectAll('g')
             .data(group_ticks)
@@ -165,14 +172,14 @@ $(document).ready(function(){
     svg.append('g')
             .attr('class', 'chord')
             .selectAll('path')
-            .data(chord.chords)
+            .data(function (chords) { return chords; })
             .enter().append('path')
             .style('fill', function (d) { return fill(d.target.index); })
-            .attr('d', d3.svg.chord().radius(inner_radius))
+            .attr('d', d3.ribbon().radius(inner_radius))
             .style('opacity', .8);
 
     svg.append("g").selectAll(".arc")
-            .data(chord.groups)
+            .data(function (chords) { return chords.groups; })
             .enter().append("svg:text")
             .attr("dy", ".35em")
             .attr("style", function(d) { return d.index == 0 ? "font-size: .75em; font-weight: bold;" : "font-size: .70em;"; } )
diff --git a/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coPIPersonLevelD3.ftl b/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coPIPersonLevelD3.ftl
index f29f0c8e..a1660668 100644
--- a/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coPIPersonLevelD3.ftl
+++ b/webapp/src/main/webapp/templates/freemarker/visualization/personlevel/coPIPersonLevelD3.ftl
@@ -119,10 +119,9 @@ $(document).ready(function(){
         uris.push("${collaborator.collaboratorURI}");
     </#list>
 
-    var chord = d3.layout.chord()
-            .padding(0.05)
-            .sortSubgroups(d3.descending)
-            .matrix(matrix);
+    var chord = d3.chord()
+            .padAngle(0.05)
+            .sortSubgroups(d3.descending);
 
     var width  = 725;
     var height = 725;
@@ -130,17 +129,25 @@ $(document).ready(function(){
     var inner_radius = Math.min(width, height) * 0.37;
     var outer_radius = Math.min(width, height) * 0.39;
 
-    var fill = d3.scale.category10();
+    var fill = d3.scaleOrdinal()
+            .domain(d3.range(20))
+            .range(["#000000", "#1f77b4", "#aec7e8", "#ff7f0e", "#ffbb78",
+                "#2ca02c", "#98df8a", "#d62728", "#ff9896", "#9467bd",
+                "#c5b0d5", "#8c564b", "#c49c94", "#e377c2", "#f7b6d2",
+                "#7f7f7f", "#c7c7c7", "#bcbd22", "#dbdb8d", "#17becf"
+            ]);
+    // #9edae5
 
     var svg = d3.select('#chord').append('svg')
             .attr('width', width+padding)
             .attr('height', height+padding)
-            .append('g').attr('transform', 'translate(' + (width+padding) / 2 + ',' + (height+padding) / 2 +')');
+            .append('g').attr('transform', 'translate(' + (width+padding) / 2 + ',' + (height+padding) / 2 +')')
+            .datum(chord(matrix));
 
-    svg.append('g').selectAll('path').data(chord.groups).enter()
-            .append('path').style('fill', function(val) { return val.index == 0 ? "#000000" : fill(val.index); })
-            .style('stroke', function(val) { return val.index == 0 ? "#000000" : fill(val.index); })
-            .attr('d', d3.svg.arc().innerRadius(inner_radius).outerRadius(outer_radius))
+    svg.append('g').selectAll('path').data(function(chords) { return chords.groups; }).enter()
+            .append('path').style('fill', function(val) { return fill(val.index); })
+            .style('stroke', function(val) { return fill(val.index); })
+            .attr('d', d3.arc().innerRadius(inner_radius).outerRadius(outer_radius))
             .on('click', chord_click())
             .on("mouseover", chord_hover(.05))
             .on("mouseout", chord_hover(.8));
@@ -157,7 +164,7 @@ $(document).ready(function(){
 
     var chord_ticks = svg.append('g')
             .selectAll('g')
-            .data(chord.groups)
+            .data(function(chords) { return chords.groups; })
             .enter().append('g')
             .selectAll('g')
             .data(group_ticks)
@@ -169,14 +176,14 @@ $(document).ready(function(){
     svg.append('g')
             .attr('class', 'chord')
             .selectAll('path')
-            .data(chord.chords)
+            .data(function(chords) { return chords; })
             .enter().append('path')
             .style('fill', function (d) { return fill(d.target.index); })
             .attr('d', d3.svg.chord().radius(inner_radius))
             .style('opacity', .8);
 
     svg.append("g").selectAll(".arc")
-            .data(chord.groups)
+            .data(function(chords) { return chords.groups; })
             .enter().append("svg:text")
             .attr("dy", ".35em")
             .attr("style", function(d) { return d.index == 0 ? "font-size: .75em; font-weight: bold;" : "font-size: .70em;"; } )