diff --git a/config/config.go b/config/config.go
index e0465ba..0b9326a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Package config handles the configuration parsing for FabricMon.
 package config
diff --git a/infiniband/bitops.go b/infiniband/bitops.go
index 1fb0a80..2f2eeb6 100644
--- a/infiniband/bitops.go
+++ b/infiniband/bitops.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Low-level bit operations.
 
diff --git a/infiniband/bitops_test.go b/infiniband/bitops_test.go
index 49a3a5f..331e170 100644
--- a/infiniband/bitops_test.go
+++ b/infiniband/bitops_test.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Low-level bit operations.
 
diff --git a/infiniband/ibumad.go b/infiniband/ibumad.go
index 92318f1..0ff0b9b 100644
--- a/infiniband/ibumad.go
+++ b/infiniband/ibumad.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Functions analogous to libibumad.
 // Note: When running in an ibsim environment, the libumad2sim.so LD_PRELOAD hijacks libc syscall
diff --git a/infiniband/infiniband.go b/infiniband/infiniband.go
index 74cc6ec..62f4194 100644
--- a/infiniband/infiniband.go
+++ b/infiniband/infiniband.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 //
 // TODO: Implement user-friendly display of link rate (see ib_types.h).
 
diff --git a/infiniband/netdiscover.go b/infiniband/netdiscover.go
index f8eebf5..f4bf722 100644
--- a/infiniband/netdiscover.go
+++ b/infiniband/netdiscover.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 package infiniband
 
diff --git a/infiniband/nodenamemap.go b/infiniband/nodenamemap.go
index ac08b98..d51f8c3 100644
--- a/infiniband/nodenamemap.go
+++ b/infiniband/nodenamemap.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Go implementation of InfiniBand node name map lookup functions.
 
diff --git a/infiniband/nodenamemap_test.go b/infiniband/nodenamemap_test.go
index 6d1907e..36844f7 100644
--- a/infiniband/nodenamemap_test.go
+++ b/infiniband/nodenamemap_test.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 package infiniband
 
diff --git a/infiniband/sm.go b/infiniband/sm.go
index 1ac20ba..1778362 100644
--- a/infiniband/sm.go
+++ b/infiniband/sm.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Subnet manager functions.
 
diff --git a/main.go b/main.go
index ef4533d..07b5246 100644
--- a/main.go
+++ b/main.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // cgo wrapper around libibumad / libibnetdiscover.
 // Note: Due to the usual permissions on /dev/infiniband/umad*, this will probably need to be
diff --git a/version/info.go b/version/info.go
index 609de86..19fdda9 100644
--- a/version/info.go
+++ b/version/info.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 package version
 
diff --git a/writer/forcegraph/forcegraph.go b/writer/forcegraph/forcegraph.go
index b62c467..31498c9 100644
--- a/writer/forcegraph/forcegraph.go
+++ b/writer/forcegraph/forcegraph.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Package forecegraph implements the ForceGraphWriter, which writes the fabric topology to a JSON
 // file suitable for use by the d3.js force graph functions.
diff --git a/writer/influxdb/influxdb.go b/writer/influxdb/influxdb.go
index a25953c..901228f 100644
--- a/writer/influxdb/influxdb.go
+++ b/writer/influxdb/influxdb.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Package influxdb implements the InfluxDBWriter, which writes InfiniBand performance counters to
 // one or more configured InfluxDB backends.
diff --git a/writer/writer.go b/writer/writer.go
index 981a6c6..d5eb170 100644
--- a/writer/writer.go
+++ b/writer/writer.go
@@ -1,5 +1,5 @@
 // Copyright 2017-20 Daniel Swarbrick. All rights reserved.
-// Use of this source code is governed by a GPL license that can be found in the LICENSE file.
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 // Package writer defines the FabricWriter interface type, which all FabricMon writers must
 // implement in order to receive fabric topologies and counters. What each writer does with that