diff --git a/src/wp-content/themes/twentynineteen/sass/elements/_elements.scss b/src/wp-content/themes/twentynineteen/sass/elements/_elements.scss
index b1fad05838bff..edc11cdf91eb3 100644
--- a/src/wp-content/themes/twentynineteen/sass/elements/_elements.scss
+++ b/src/wp-content/themes/twentynineteen/sass/elements/_elements.scss
@@ -40,6 +40,7 @@ a:focus {
 	outline: thin;
 	outline-style: dotted;
 	text-decoration: underline;
+	text-decoration-thickness: 2px;
 }
 
 h1,
diff --git a/src/wp-content/themes/twentynineteen/sass/navigation/_links.scss b/src/wp-content/themes/twentynineteen/sass/navigation/_links.scss
index cbee4579d6947..ed801e7764894 100644
--- a/src/wp-content/themes/twentynineteen/sass/navigation/_links.scss
+++ b/src/wp-content/themes/twentynineteen/sass/navigation/_links.scss
@@ -17,5 +17,6 @@ a {
 	&:focus {
 		outline: thin dotted;
 		text-decoration: underline;
+		text-decoration-thickness: 2px;
 	}
 }
diff --git a/src/wp-content/themes/twentynineteen/sass/site/primary/_comments.scss b/src/wp-content/themes/twentynineteen/sass/site/primary/_comments.scss
index dc7b80c15b22b..fa4000e304ffa 100644
--- a/src/wp-content/themes/twentynineteen/sass/site/primary/_comments.scss
+++ b/src/wp-content/themes/twentynineteen/sass/site/primary/_comments.scss
@@ -323,6 +323,7 @@
 
 		a {
 			text-decoration: underline;
+			text-decoration-thickness: 2px;
 
 			&:hover {
 				text-decoration: none;
diff --git a/src/wp-content/themes/twentynineteen/sass/site/primary/_posts-and-pages.scss b/src/wp-content/themes/twentynineteen/sass/site/primary/_posts-and-pages.scss
index ce1c6f2909226..a940d218dde53 100644
--- a/src/wp-content/themes/twentynineteen/sass/site/primary/_posts-and-pages.scss
+++ b/src/wp-content/themes/twentynineteen/sass/site/primary/_posts-and-pages.scss
@@ -212,6 +212,7 @@
 
 		a {
 			text-decoration: underline;
+			text-decoration-thickness: 2px;
 
 			&.button,
 			&:hover {
diff --git a/src/wp-content/themes/twentynineteen/sass/site/secondary/_widgets.scss b/src/wp-content/themes/twentynineteen/sass/site/secondary/_widgets.scss
index 9447d428889c4..1032f634345d3 100644
--- a/src/wp-content/themes/twentynineteen/sass/site/secondary/_widgets.scss
+++ b/src/wp-content/themes/twentynineteen/sass/site/secondary/_widgets.scss
@@ -81,6 +81,7 @@
 
 	a {
 		text-decoration: underline;
+		text-decoration-thickness: 2px;
 	}
 
 	.wp-calendar-table {
@@ -103,4 +104,4 @@
 	.wp-calendar-nav-next {
 		width: 40%;
 	}
-}
\ No newline at end of file
+}
diff --git a/src/wp-content/themes/twentynineteen/sass/typography/_copy.scss b/src/wp-content/themes/twentynineteen/sass/typography/_copy.scss
index bfbd0feb463f8..37e08dfd2d8aa 100644
--- a/src/wp-content/themes/twentynineteen/sass/typography/_copy.scss
+++ b/src/wp-content/themes/twentynineteen/sass/typography/_copy.scss
@@ -58,5 +58,6 @@ a {
 
 	&:focus {
 		text-decoration: underline;
+		text-decoration-thickness: 2px;
 	}
 }
diff --git a/src/wp-content/themes/twentynineteen/style-rtl.css b/src/wp-content/themes/twentynineteen/style-rtl.css
index 29f011976564a..c18f66b66c64b 100644
--- a/src/wp-content/themes/twentynineteen/style-rtl.css
+++ b/src/wp-content/themes/twentynineteen/style-rtl.css
@@ -2471,6 +2471,7 @@ a:hover {
 
 a:focus {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 /* Elements */
@@ -2512,6 +2513,7 @@ a:focus {
   outline: thin;
   outline-style: dotted;
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 h1,
@@ -2760,6 +2762,7 @@ a:active {
 a:focus {
   outline: thin dotted;
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 /*--------------------------------------------------------------
@@ -4423,6 +4426,7 @@ body.page .main-navigation {
 
 .entry .entry-content a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .entry .entry-content a.button, .entry .entry-content a:hover {
@@ -4900,6 +4904,7 @@ body.page .main-navigation {
 
 .comment .comment-content a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .comment .comment-content a:hover {
@@ -5225,6 +5230,7 @@ body.page .main-navigation {
 
 .widget_calendar .calendar_wrap a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .widget_calendar .calendar_wrap .wp-calendar-table {
diff --git a/src/wp-content/themes/twentynineteen/style.css b/src/wp-content/themes/twentynineteen/style.css
index 9d68322d74425..f4c87a3b07884 100644
--- a/src/wp-content/themes/twentynineteen/style.css
+++ b/src/wp-content/themes/twentynineteen/style.css
@@ -2471,6 +2471,7 @@ a:hover {
 
 a:focus {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 /* Elements */
@@ -2512,6 +2513,7 @@ a:focus {
   outline: thin;
   outline-style: dotted;
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 h1,
@@ -2760,6 +2762,7 @@ a:active {
 a:focus {
   outline: thin dotted;
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 /*--------------------------------------------------------------
@@ -4429,6 +4432,7 @@ body.page .main-navigation {
 
 .entry .entry-content a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .entry .entry-content a.button, .entry .entry-content a:hover {
@@ -4906,6 +4910,7 @@ body.page .main-navigation {
 
 .comment .comment-content a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .comment .comment-content a:hover {
@@ -5231,6 +5236,7 @@ body.page .main-navigation {
 
 .widget_calendar .calendar_wrap a {
   text-decoration: underline;
+  text-decoration-thickness: 2px;
 }
 
 .widget_calendar .calendar_wrap .wp-calendar-table {